Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d919942a66557d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-18 23:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a7edebe3ce344cd5951436f886758c5 SHA-1: b921c6df2caf9ef3888428392ed61ceed8de12a4 SHA-256: 08d919942a66557df5c7f799ece77b509ca9f9db9eae487cb082f644e412d42f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com). The redirector is configured with a keyword suggesting a lure related to 'codecademy ruby on rails answers', and it ultimately leads to a phishing page disguised as a free download. The ML classifier strongly indicates maliciousness, and the link farm behavior is a common tactic for SEO poisoning and phishing.

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=codecademy+ruby+on+rails+answers In PDF document text
    • http://files.askahealthcaretraveler.com/uploads/1/3/1/3/131398560/filixojevukavifebabo.pdfIn PDF document text
    • http://files.amalficoastreview.com/uploads/1/3/1/3/131381452/2302694.pdfIn PDF document text
    • http://files.foodbiomedicalscience.com/uploads/1/3/1/4/131406799/sabikogu_xujepesuparoz.pdfIn PDF document text
    • http://files.lindahugues.com/uploads/1/3/1/8/131858287/butip_lemomujatebiz_zifipexizefu.pdfIn PDF document text
    • http://files.mcconservation.org/uploads/1/3/1/4/131438245/5845220.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/1/0432/8259/6004/files/sisoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/74405314271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/davewenufebonemawomatali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/sims_3_empty_worlds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3108/1639/files/dmv_14_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/pathophysiology_of_viral_hepatitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/ccrn_study_guide_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/nuwawidive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8747/0496/files/dagekudagowibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/difimu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 5324 bytes
SHA-256: 23412e2a05d4a979bca29961c7973dfea949c79b124b00b93b0c0daa364c0a1a
font_01_sfnt_off0000824e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824E 9796 bytes
SHA-256: ecbaf00865bb7e88db579de0194498983ee68d632818289ce2d73f34655e523c

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