Malicious PDF — malware analysis report

Static analysis result for SHA-256 096734fcd8bae56b…

MALICIOUS

PDF

42.9 KB Created: 2020-08-24 09:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86f1e541d461a029dd0bf96d68670287 SHA-1: f942a1900969aeb80f96a5dd9c5fb25b729152e3 SHA-256: 096734fcd8bae56bf9431a96897cb13982fa15dfe877538201f62285ea24901f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.com/pify?keyword=lsat+logic+games+sample+questions+and+answers', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, reinforcing the lure. No scripts were extracted, but the presence of numerous links and the malicious redirector indicate 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=lsat+logic+games+sample+questions+and+answers
    • http://files.eyerlyarchitecture.com/uploads/1/3/1/4/131406403/185b09d2a.pdf
    • http://files.watestingllc.shop/uploads/1/3/1/8/131857723/38d11f907b0.pdf
    • http://boganes.richmullins.candletothesun.com/uploads/1/3/1/8/131856602/womipaboxefudaponef.pdf
    • http://bopisoxa.azioshsfi.org/uploads/1/3/0/7/130738667/fuwifagunovivules.pdf
    • http://files.mahayanacollections.com/uploads/1/3/1/8/131858661/kovudakuwuviku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/20111445381.pdf
    • https://cdn.shopify.com/s/files/1/0428/9540/9311/files/45365060097.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/vuxavikisovadadavopakoxur.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/dogowewagixulilibopoj.pdf
    • https://cdn.shopify.com/s/files/1/0449/2450/2171/files/lowes_kingsland_ga.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/introscope_workstation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/puripin.pdf
    • https://cdn.shopify.com/s/files/1/0463/3637/6993/files/unisa_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/dulajarawusane.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/52868198801.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/nivovan.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_off0000663e.bin
abd39c269bab8ef0177344958d1aa20b732bfe1049e06ac0d1cfb2402c26b519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 5552 bytes
font_01_sfnt_off00007912.bin
aa10ceff61f7aa50925729a8990c9b7c715cc217362ac28e795fac55450e14da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 11036 bytes

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