Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f028a92090c268…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 17:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be391d91501ccf8ff84fea83f6263a9e SHA-1: 38b033b6c3e8318aa2540ccb87504027ad64072b SHA-256: a2f028a92090c268dfd7d15b4c09dda8c4386161bcac670e68bd3adbe7ef39ac
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to shopify.com, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Jabber guest deployment guide' and the malicious URL, suggesting a lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=jabber+guest+deployment+guide
    • http://files.everlastinglovechurch.org/uploads/1/3/1/6/131607522/e6e1aae7.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/gaussian_fit_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/3913/6661/files/cours_d_anglais_pour_dbutant_gratuit_en.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/modern_automotive_technology_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/13904393012.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/98166334003.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/juwefovifevajexibat.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/pivilaxitoniniz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/home_design_3d_photos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/jebezimazafejulufimadozi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/anaximandro_de_mileto.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3420/files/54634360107.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/57596712864.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/exercices_svt_2_bac_international_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/basizazafitapekaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/bosud.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007207.bin
42398d3ef0711a0a7b15413e3b4f749347c34cab5bfbd015b9aa18d0f97666b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7207 5512 bytes
font_01_sfnt_off000084ab.bin
b84bfc655f94cbb783d1b7c5f35be373b198311b48d38b9ddba6e2514ba694de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 10144 bytes

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