Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcc525861fa6ea2…

MALICIOUS

PDF

38.7 KB Created: 2020-08-10 04:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f9d90798f9759c4cdd128cd27ffab8b SHA-1: 5421b2d0f8dd658e1620c48152acc02b4102de94 SHA-256: 2fcc525861fa6ea2b72841f3420f2737aa50587cd57b0b422a6b8d17eacf1eda
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains text related to 'English speaking course urdu pdf free download' and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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=english+speaking+course+urdu+pdf+free+download
    • http://files.thewhitehouseproductions.com/uploads/1/3/1/4/131454808/09f874a01728.pdf
    • http://files.instantresultswithkate.com/uploads/1/3/1/3/131398555/b44aeae.pdf
    • http://vuxabe.vernoncadetmuseum.com/uploads/1/3/2/7/132712207/8053626.pdf
    • http://files.kylesteffensmotorsports.com/uploads/1/3/0/8/130874458/5411467.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdf
    • https://cdn.shopify.com/s/files/1/0431/9045/2385/files/waves_physics.pdf
    • https://cdn.shopify.com/s/files/1/0448/4349/9677/files/formative_assessment_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/vikunirizorikidoralaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/first_anglo_afghan_war.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/54578494051.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/gulamuladolizasijowixole.pdf
    • https://cdn.shopify.com/s/files/1/0436/2017/1936/files/76606317621.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/define_behavioural_learning_theory.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/pitem.pdf
    • https://cdn.shopify.com/s/files/1/0433/5999/4014/files/86646303865.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/pagijaganodapidagijozono.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/zarowelune.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004db6.bin
f389c8e9322c41dfc32b863012fbe1a248dd5fbb6d160b9c4b632d4a19d7a674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB6 5332 bytes
font_01_sfnt_off00005fd3.bin
15675acccf9932478ad0488c59c78a34a1371de11e88652c5c2eaf923704ed64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 9408 bytes
font_02_sfnt_off00007f34.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F34 4324 bytes

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