Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d31e13b736e77ac…

MALICIOUS

PDF

43.1 KB Created: 2020-08-23 02:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b6f62bcb5f18570991767d82573e361 SHA-1: 3b9c1018b3c61bbdd9aa49e739cf2f91579eda68 SHA-256: 9d31e13b736e77ac82a49c232c5a42c832d241cc9bad1016e8d79e70d5c6e5b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=bosch+kiv38x22gb+integrated+fridge+freezer+manual, which likely leads to a malicious payload. The document body, though heavily obfuscated, contains references to the redirector URL, reinforcing the malicious intent. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

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=bosch+kiv38x22gb+integrated+fridge+freezer+manual In PDF document text
    • http://files.andrewflojo.com/uploads/1/3/1/4/131453598/mugedozavigov-fowibin-wefibevuwibuz.pdfIn PDF document text
    • http://zerem.rwandamedicaljournal.org/uploads/1/3/1/4/131482975/dokajo.pdfIn PDF document text
    • http://files.lauragilliom.com/uploads/1/3/0/8/130873718/xamun.pdfIn PDF document text
    • http://files.flight111.co/uploads/1/3/1/3/131398369/4079564.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/1/0431/7069/3284/files/jogelulukek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/possessivpronomen_italienisch_bungen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6712/7446/files/womomijutujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/oriflame_catalog_january_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/brew_list_installed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/libizuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/sexinoxofokikakosizej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0206/8131/files/dumakabofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/78547883300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/94365203527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/javipozafukikulagit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5019/6389/files/bssc._bih._nic._in_admit_card_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/79962879528.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 7

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_off000066c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 6356 bytes
SHA-256: 2f62bbde7c011586468f96f94363c88a10cb99952bc01a38f67ada9fdbe6529b
font_01_sfnt_off00007c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 10104 bytes
SHA-256: e1b23bbc5de62936b388692c6467bb010f6c9fa417be7083ce2759a6bad37925

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