Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80f9dad49851d1a…

MALICIOUS

PDF

54.8 KB Created: 2020-08-13 21:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df84e3460c659903786e35a8ca1f504c SHA-1: 50e6572afc2be9b6f54389f8abaf0aba875b6a89 SHA-256: c80f9dad49851d1a8abc7d2cfcdbd9262c235eba68f28d8cdaec265db69a7984
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that is disguised as a lab report. The link leads to 'ttraff.cc', which is known for redirecting to malicious sites. The PDF also contains a large number of external links, many of which point to Shopify domains, likely as part of a link farm to improve SEO for malicious content. The ML classifier 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/pify?keyword=acid+base+titration+curve+lab+report
    • http://files.phelpsmuseum.com/uploads/1/3/0/7/130739525/4770384.pdf
    • http://files.theinspiracy.com/uploads/1/3/2/3/132303083/zuzaborabitaf.pdf
    • http://files.wolfpackmeteorology.com/uploads/1/3/0/7/130739415/giruguzor-mubetivexud-difixotapemur.pdf
    • http://files.doorwaystoadventure.com/uploads/1/3/1/3/131398250/1808453.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22511335110.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/66029185476.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/intermediate_accounting_ifrs_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/logiciel_traduction_anglais_franais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/arduino_building_led_and_espionage_projects.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7445/files/linear_search_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/2512/0927/files/schneider_vivace_switches_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/razifirenupotagogavaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/physically_based_rendering_encyclopedia.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/58011085027.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008954.bin
5895a145e19b18c83b2ad788bce1e54eb8aeeef87456a8d4646fcf155ff54465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8954 5140 bytes
font_01_sfnt_off00009ad0.bin
4808665a4a129fa366444ca710e894b62dd6624cb36d38c42abc7f426a90ca87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD0 10920 bytes
font_02_sfnt_off0000bfa6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA6 4324 bytes

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