Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a60cdc1d8429ad…

MALICIOUS

PDF

51.5 KB Created: 2020-08-03 21:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02008aafccc09f5f22a8f220facc45b9 SHA-1: d35b24f12f5f172670d0a378222efb233fa45a37 SHA-256: 10a60cdc1d8429adf423a8980c4bcbf76c4554b2f9dca594a82fecd5e47592d1
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure for a 'free download project report'. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates 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=pdf+file+free+download+project+report+on+patanjali
    • http://files.edgeofthevillage.org/uploads/1/3/1/6/131606289/wujadisunova-sewifoxerefe-bosadixitifeb.pdf
    • http://files.feteandfolly.com/uploads/1/3/2/8/132816096/7910107.pdf
    • http://files.jayconey.com/uploads/1/3/1/8/131856435/5864876.pdf
    • http://files.activeagingecho.com/uploads/1/3/1/0/131070291/tilumolakemoto_tegabujivu.pdf
    • http://files.district4trials.org/uploads/1/3/2/3/132302710/7582033.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/nejonazurepulafusazujon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/kadogodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/famogabexejebalup.pdf
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/70894256562.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/58901099833.pdf
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/21981592916.pdf
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/private_show_ti_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8263/files/61718994480.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/43714110057.pdf
    • https://cdn.shopify.com/s/files/1/0428/5533/4055/files/python_create_file_if_not_exists.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/5630410615.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/78104165742.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/pimarila.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000753b.bin
2b3f9cb0e1f65b69f213c47019e9b6627eed2bf4372d79cedf24b58451636036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753B 5140 bytes
font_01_sfnt_off000086dd.bin
f58e650950b1a92d82863e6b4da3d96501d024017b798158f787facbe7ddf19e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DD 10548 bytes
font_02_sfnt_off0000ab01.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB01 16164 bytes

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