Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b24b32580ea5276…

MALICIOUS

PDF

44.8 KB Created: 2020-08-20 23:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f336a93708f2c040350697ef6bf6799 SHA-1: 7494f6048b808acd4b69afb95bad5a0de37df65b SHA-256: 1b24b32580ea5276ad025ca0633e8034cf1d0d5f8aa7ed7c178f74eb91f9db06
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-hosted PDFs, which is characteristic of a link farm. One of these links directs to a known malicious redirector, ttraff.ru, suggesting a malicious intent to lead users to harmful content. 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.ru/pify?keyword=rust+flamethrower+raid+guide
    • http://files.waynemcvicker.com/uploads/1/3/1/0/131069789/ledoditusutemowopero.pdf
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdf
    • http://mamufop.toritiscia.com/uploads/1/3/1/8/131857920/donis-zifefivafigewo-xumijavuwojak-bowatokovulajel.pdf
    • http://wakuma.mellowspringfamilyfarms.com/uploads/1/3/2/7/132740214/wumapigosasurad_kuwonotajivis_gupebutiduk_manivijitemem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6576/0151/files/mivawafegabezeludiwozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/bepatasenubunodako.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/space_orientation_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/nokevi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1509/1870/files/47268532565.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/91250704265.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/45220977837.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/61881663230.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/sheetz_corporate_office_claysburg_pa.pdf
    • https://cdn.shopify.com/s/files/1/0440/3852/0997/files/biblia_de_estudio_herencia_reformada_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/adobe_acrobat_pro_2017_windows.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_off00007277.bin
c56ce0099183b4e1de1505868db35870da7f64da8b1432658e938b8100f97464
pdf-font-stream PDF embedded font (sfnt) at offset 0x7277 5420 bytes
font_01_sfnt_off000084db.bin
36e97b11a44ba7253d164fb2e49b565494203fae5be2c835884e40c85bc70752
pdf-font-stream PDF embedded font (sfnt) at offset 0x84DB 9664 bytes