Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c5313253e9c83e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 08:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25ed5064716ec987bc17b18737cb92ac SHA-1: 79a42957678725921bdc0479c7a336a7335f3e1b SHA-256: 38c5313253e9c83e4a71aecc913d65751a1a733c056739aaf85a3250a6b0192e
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to Shopify domains, which is indicative of a link farm. One prominent link, 'https://ttraff.cc/pify?keyword=how+to+achieve+goals+in+life+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to achieving goals and the PDF's creation metadata, suggesting a lure to disguise the malicious redirection.

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=how+to+achieve+goals+in+life+pdf
    • http://files.wazany.com/uploads/1/3/1/6/131606875/gulibo_mogoga.pdf
    • http://files.drclaytonmberger.com/uploads/1/3/0/9/130968934/fe8666c94c55.pdf
    • http://files.amblesidesanangelo.net/uploads/1/3/0/8/130813516/8923311.pdf
    • http://files.thevitalitycafe.com/uploads/1/3/2/8/132815123/gedoxutede.pdf
    • http://files.marleemoo.com/uploads/1/3/1/4/131437532/lexukumif.pdf
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/wondershareelement_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/65675232706.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/jewokojig.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/povetuxegiwipuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/apa_publication_manual_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/fopinenuxoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/valid_us_address.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/zodunamibizerifesafoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/mograine_s_deathcharger_legion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/82721388654.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.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_off000065cb.bin
ee1e801ca41ed09b56b1af75d2cee9c1d6a32168697f3a7d3de594f69ab5132f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 5432 bytes
font_01_sfnt_off00007863.bin
a4a948d639f9426f24e7452a085da461e94dcf183864e711ce5b6e68925e6bda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7863 10548 bytes

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