Malicious PDF — malware analysis report

Static analysis result for SHA-256 809c1a28bbe450b1…

MALICIOUS

PDF

68.5 KB Created: 2020-08-11 17:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4012622c9643d3dc0c62bdccfb0bce9d SHA-1: 1ce4bf802081ff892715477d48296f4523033907 SHA-256: 809c1a28bbe450b1d167860af1a08890491fb8de97c92da17321380a2090bf1f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which point to a redirector service known to host malicious content. The primary redirector URL is https://ttraff.com/pify?keyword=artificial+neural+network+using+python+pdf, which appears to be part of an SEO link farm designed to lure victims with seemingly legitimate document titles. The document body itself is heavily obfuscated but contains references to the redirector and several Shopify-hosted PDF files, some of which are confirmed benign, while others are unknown.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=artificial+neural+network+using+python+pdf In PDF document text
    • http://files.boatinsurance.wales/uploads/1/3/0/9/130969061/1329093.pdfIn PDF document text
    • http://files.hummingbirdwordco.ca/uploads/1/3/0/7/130775980/galivikewapu.pdfIn PDF document text
    • http://files.amyjgardiner.com/uploads/1/3/0/8/130814003/479bfbec271.pdfIn PDF document text
    • http://budadog.midvalleydoulas.net/uploads/1/3/0/7/130775320/xofoluwabidela.pdfIn PDF document text
    • http://files.krismcg.com/uploads/1/3/1/4/131406800/mebekovejanelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/13619832270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/68244626796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/74955535021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/addictive_thinking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/puzidigemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/23117491227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/40771619380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/adjektivdeklination_bung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/25532959601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/neweloziwasupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5584/0422/files/8036493508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/88419113490.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41C 5664 bytes
SHA-256: ca7119e427167f2222b2c122c05287d0eedc6fc3f756ecaea1dd5f1300e0dbd7
font_01_sfnt_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 10672 bytes
SHA-256: 632197c011ad67717cec1dd396a8b98aa5a1103d477ed730ee01e5f093c7bb43
font_02_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 17040 bytes
SHA-256: 32a0c0f2838f28f32967bcc7426625b609566e18730859798cfe54c31243abe3