Malicious PDF — malware analysis report

Static analysis result for SHA-256 035bb9b94a84f0dd…

MALICIOUS

PDF

44.8 KB Created: 2020-08-19 19:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eac769a39e85416d30f3c8a699bac790 SHA-1: 699536d2a14dac5b2f3917ea0f73733bba883beb SHA-256: 035bb9b94a84f0dd751934eca363747e9eaefd4112aea7095af23bdd5537d4b2
162 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to what appears to be a link farm designed to host numerous PDF files. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=akkurat+mono+font
    • http://tozokefu.milwaukeepizzacompany.com/uploads/1/3/0/7/130740558/totibirin.pdf
    • http://doxeva.greenmedstore.net/uploads/1/3/1/4/131406686/3019410.pdf
    • http://files.dreadfixations.com/uploads/1/3/2/3/132302910/9647707.pdf
    • http://vovali.bodylabchiropracticandmassage.com/uploads/1/3/0/7/130738720/faxobabifowij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/bootstrap_rtl_4._1._3.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/99298377930.pdf
    • https://cdn.shopify.com/s/files/1/0437/2286/6837/files/human_fetal_circulation.pdf
    • https://cdn.shopify.com/s/files/1/0432/4212/7527/files/bikuwubidakep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/ragonizemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/61288298093.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/38168602172.pdf
    • https://cdn.shopify.com/s/files/1/0436/1682/9603/files/nosedawukaxakirem.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/domupivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/zamzar_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/tecno_spark_2_ka70_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/vukalusu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d4.bin
926871b3bdb6a85e1eb13095cbff5e2c5f564366381dc4901d454129a6ce2253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 4756 bytes
font_01_sfnt_off000082ef.bin
91d70c51b71c6d0d0556a7d5f55cd7540e6417dcb05312d8dea017920b9e90f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EF 10344 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.