Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2c77a8f4c90ee3…

MALICIOUS

PDF

43.9 KB Created: 2020-08-07 07:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a1e3406ad9b2026724f2fbdedd6e864 SHA-1: 3079d0bcca6e1f1e0eaffe9551501d54dcbb4064 SHA-256: ef2c77a8f4c90ee387e24139736e05bf7b8504b46869f2209b80528df17b1660
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 primary link pointing to a known malicious redirector. The document body, though heavily corrupted, contains the URL 'https://ttraff.com/pify?keyword=mri+brain+atlas+and+text+pdf', which is flagged as a malicious redirector. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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=mri+brain+atlas+and+text+pdf In PDF document text
    • http://petabef.intersoftsystems.com/uploads/1/3/1/6/131636612/f1b04618eb3.pdfIn PDF document text
    • http://files.baptistegerbier.com/uploads/1/3/2/8/132814241/zikebudok-panoka-naludosazidefe.pdfIn PDF document text
    • http://files.mischiefprojections.com/uploads/1/3/0/9/130969633/mafej-lufemofunugo-lufeb.pdfIn PDF document text
    • http://bejum.cycledoctoralfactec.com/uploads/1/3/1/4/131438641/pumazuf_vovubokilatewor_lipopanaviweta.pdfIn PDF document text
    • http://bojagugu.fdryan.com/uploads/1/3/1/0/131071164/942898.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/1/0431/4136/5922/files/77713868781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/pavanunoxiwemiborov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/86257916975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/gazuwexakatulogutumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0709/9558/files/27300268485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/gibazaduwotixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1150/4290/files/18299528915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6833/2959/files/dakurekogivozamimozix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4396/1504/files/wakegopilul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/culinary_terms_a_z.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/wofisujaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/nawogefilifolup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/31398964236.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E5 5248 bytes
SHA-256: 996162542a893b91d25414469e186cf9ffeeb1fcd28c45bc3c70a3d12c9ef7bf
font_01_sfnt_off000075cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5A 10564 bytes
SHA-256: 3ede0480761c4f923d1f3b873c895c22c3d8383f182d5bbeb5ccf32c8775a056