Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bdf0879fe95a4a9…

MALICIOUS

PDF

39.0 KB Created: 2020-08-14 00:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fe7441f9638a71c4a5e8a5b7133a9db SHA-1: 407d84a1f067c95a2a65289646e22c488241dc1e SHA-256: 4bdf0879fe95a4a966ce90a0e5e7408eba8b6424930321302b7fa040c645b336
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used to obscure the final destination. Additionally, it features a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO poisoning or distributing further payloads. The presence of a 'download button' heuristic reinforces the lure aspect.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=octopus+apk+mod+latest+version
    • http://files.geo4u.net/uploads/1/3/2/3/132303126/b09abb50.pdf
    • http://fevaw.pneumaconference.com/uploads/1/3/1/3/131383791/nowogigew.pdf
    • http://jumoxe.mapeasymposium.org/uploads/1/3/1/6/131637047/328244.pdf
    • http://xunages.travelfarwritenow.com/uploads/1/3/1/4/131406390/doxowetikojutabifu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/vapeximukotowisuxojawof.pdf
    • https://cdn.shopify.com/s/files/1/0444/4500/8039/files/improper_waste_disposal_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/15840967605.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/jelexupemuriwugibujufukad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/muvovosaxaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/wijusekulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/ethnic_groups_in_africa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/a_pocket_style_manual.pdf
    • https://cdn.shopify.com/s/files/1/0446/5927/7987/files/binary_addition_rules.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_off00005bb8.bin
7a347f709fd50798d79bfda37302254d9760910580c62d593258c1b2bb59433e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB8 5372 bytes
font_01_sfnt_off00006de9.bin
eb17e4f9073bd02b63a2a6d2ee6f730aaf333cc338ce062bab27937fe9637cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE9 9804 bytes

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