Malicious PDF — malware analysis report

Static analysis result for SHA-256 77969a0b05799c3e…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 08:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6427b47ea8cc8ae136f95a8eb8f37def SHA-1: 1f3f63bd3dbd2ef66ab226cc73a373639d8828bf SHA-256: 77969a0b05799c3e4162e9a5699a20936294295c9afd68777e896f457106a3a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.com/pify?keyword=2015+chevrolet+malibu+ls+owners+manual', is flagged as a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of numerous external links and a malicious redirector indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=2015+chevrolet+malibu+ls+owners+manual
    • http://files.3dretrievers.com/uploads/1/3/1/4/131438641/dodonas.pdf
    • http://velexelut.newdawnshelter.org/uploads/1/3/0/9/130969060/vidabizogozix-semevij-kiwes.pdf
    • http://files.image1st.org/uploads/1/3/0/7/130740522/5044104.pdf
    • http://dajug.stjosephsglenealy.com/uploads/1/3/2/6/132695643/jatesinerogad-fasixejejo-petivoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/16395722241.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/fotubesazojukajavo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/best_english_language_gcse_revision_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/elements_of_chemical_reaction_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2957/files/dipejubulunezijonagifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/guzuzebib.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6079/files/deduction_guide_cannot_be_defined.pdf
    • https://cdn.shopify.com/s/files/1/0437/4590/2746/files/nonekataxumifomuvukusot.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/lomek.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/88054508318.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/rukurajarorizesugugores.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/10806490284.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/microsoft_word_2019_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/zavelajonoratovov.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669d.bin
d819b00b195694b27df52ac264fb162d09b92f9c20eb52f598781d2349573f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 5684 bytes
font_01_sfnt_off000079dd.bin
8cf2c63006cfa1c2e89f7d352c2396c4f117412e2f04450cc2117d5c09cc16af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DD 8892 bytes

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