Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c025d5fa4c48fb2…

MALICIOUS

PDF

39.1 KB Created: 2020-08-11 21:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149b53a06c8ca786bd624ec34704b9e7 SHA-1: f00928170734de9205f80a72ac46b4a93f222865 SHA-256: 7c025d5fa4c48fb2f8bf8aa9214670efaeadd5b45115195988178c6e046518d4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at 'https://ttraff.cc/wb?keyword=generator%20dc%20shunt%20pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=generator%20dc%20shunt%20pdf
    • http://files.belvederebowlsclub.com/uploads/1/3/2/6/132681884/1381634.pdf
    • http://wewifow.therapistsmap.com/uploads/1/3/0/8/130814328/8530a706.pdf
    • http://files.windmillpreschoolbrill.com/uploads/1/3/1/3/131381919/3182821.pdf
    • http://files.qstreetband.com/uploads/1/3/0/8/130873921/021a2c80.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/83376242462.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/62731875098.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3375/files/amway_products_catalogue_with_price.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/60159474657.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/suleki.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/arduino_due_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/4162/6011/files/anesthesia_and_analgesia_in_laboratory_animals.pdf
    • https://cdn.shopify.com/s/files/1/0437/1418/3323/files/fepepesaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/40505815247.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90278046640.pdf
    • https://cdn.shopify.com/s/files/1/0439/9041/7566/files/cambridge_igcse_first_language_english_coursebook_fifth_edition_answers.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c61.bin
206790bda259fa38ee1954ea62706acbdef2b8e3f66543fc280bd50ff3603645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 5244 bytes
font_01_sfnt_off00006e31.bin
9bb57e06a4ff0da87531d2bc83fc354d0fe14c0a2a7f564a9f17a146ad86dd9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 9724 bytes

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