Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2facf2fd9a8c407…

MALICIOUS

PDF

38.7 KB Created: 2020-09-02 17:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ec90f8ac82a3b7c63d5e8b118d6ff2b SHA-1: 6a9377bcedabee74e3001285ffab12d08cfa721e SHA-256: d2facf2fd9a8c40715ab683251cb2bb63265b454e302fc65238580677a2d82a2
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with a lure related to a popular movie and WhatsApp status. It also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, and the primary IOC is the ttraff.me redirector.

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.me/wix?keyword=appa+movie+whatsapp+status
    • https://cdn.shopify.com/s/files/1/0447/9565/8389/files/drugs_for_bronchial_asthma.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/blitzscaling_reid_hoffman_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/39010298438.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/buwividotasodomizaja.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/94256816481.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/12501269861.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/the_complete_bartender_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4534/files/lezip.pdf
    • https://cdn.shopify.com/s/files/1/0466/5924/0101/files/93088642935.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/guzikijelovezavazawokalel.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/mesililebur.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/brush_up_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/apache_sqoop_cookbook.pdf
    • https://static.usrfiles.com/ugd/6a44d8_f5f8843f48724711ad24b050ca794749.pdf
    • https://static.usrfiles.com/ugd/7f16bd_44f6cbb3c2da48aca754c32a3e704cca.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_off00005a1c.bin
94da3f516c6bd669decc11c80cdf60a68156f9771bd7666d56f1d60be461ea61
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 5072 bytes
font_01_sfnt_off00006b4b.bin
d16f2e3063be9eaaad0fbab582c7ae8365a5652b124fabca71cb89a3a1c2a1fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4B 10184 bytes