Malicious PDF — malware analysis report

Static analysis result for SHA-256 374d811079a539f0…

MALICIOUS

PDF

46.5 KB Created: 2020-08-02 02:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed45e9b0ee6e3c915df4211015eb5c4b SHA-1: 5569bb001d5ee2d17666cf7194921c3d64a0da41 SHA-256: 374d811079a539f0269487dbd80f12817e979c5e5dfeea30c5151842505c4414
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a critical heuristic for containing a malicious redirector link to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one pointing to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to external content. No scripts were extracted, but the presence of a malicious redirector and a link farm strongly indicates a phishing or malware distribution 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=hai+hoai+linh
    • http://files.whitemountainacfchefs.org/uploads/1/3/0/9/130969356/d219c.pdf
    • http://files.stmark-lutheran.org/uploads/1/3/0/8/130814926/wubotemovenibeb-vudefejusefajav-vipupijawu.pdf
    • http://files.bowerslab.org/uploads/1/3/1/3/131398102/9d47e.pdf
    • http://files.southernmiddlemusic.com/uploads/1/3/0/7/130775902/83ad83119e.pdf
    • https://cdn.shopify.com/s/files/1/0437/4478/8634/files/ginopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/12208496537.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/gunuvo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/62707656833.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2679/files/17511907009.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/dezogukajiwirepowarago.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/rinokivolofunesegota.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/fagewizabojubowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/80973950155.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/49124879912.pdf
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/1066063580.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/98597661469.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/74624252564.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005988.bin
ad6e56f1b2ad7e22decbd8a7e358d3ce281310d4381cff05aebd6943c244baf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5988 4048 bytes
font_01_sfnt_off00006711.bin
323156736c57d1cf3603f051354c0418ade8113c4815284de47675a28055e779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6711 10496 bytes
font_02_sfnt_off00008a2c.bin
336c05e31050834ddda66c7d1f3f7cb38f9a025d8b3481d17f8dbf821713a61c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2C 16080 bytes
font_03_sfnt_off00009ed4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED4 4324 bytes

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