Malicious PDF — malware analysis report

Static analysis result for SHA-256 798bdc7ecf2998aa…

MALICIOUS

PDF

37.9 KB Created: 2020-08-17 16:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a4f54d1e2c0126f76b27daa389a12140 SHA-1: aad0f9fa18fc9ec9ede7bb2e77f75eb43bd976db SHA-256: 798bdc7ecf2998aaebe2c6a54a9d88be9ff74a35b366cdf26d9990444102f78d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=greek+bible+dictionary+pdf`. The document body, though partially corrupted, also contains this URL and references to other PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.cc/pify?keyword=greek+bible+dictionary+pdf In PDF document text
    • http://files.strawberryflats.com/uploads/1/3/1/0/131070035/wiwafase-livaredujus-vivodokamopax-kerun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/66284376451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/57468364853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8223/6572/files/sudden_attack_2_game_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/morezokiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/kufaxul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/derivatives_of_algebraic_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/70376701322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/selibarugumigokinaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/66075142232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/xisew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/jofafupikanixajawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5680/6565/files/sri_narasimha_kavacham_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3952/8872/files/aleppo_codex_matti_friedman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/web_root_spysweeper.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5457 5308 bytes
SHA-256: b07277d32e567f4214ca5b162b822b98ac8d4a61c362d95634ff9da4a0f639a1
font_01_sfnt_off00006685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 10720 bytes
SHA-256: 80110dd807d8bc738883f3625c44b9671fe288c9fc29a866a56aa9491583c6f9

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