Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a09dd06cc21260…

MALICIOUS

PDF

40.2 KB Created: 2020-08-10 16:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f15393e5aed292acb79afafc50fe4dfc SHA-1: fff82231a3d7a33f84ed9bb8f2a93563dcb52ee8 SHA-256: 30a09dd06cc212609f1d169997f77b6a6ec57102a688226cbd7d845db69c8b4b
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO spam campaign, with the primary redirector likely serving malicious content.

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.com/pify?keyword=systematic+approaches+to+a+successful+literature+review+booth+pdf
    • http://kaxirep.cheekyupstart.co.nz/uploads/1/3/1/3/131383664/7d394e7695404.pdf
    • http://files.sepand.info/uploads/1/3/2/6/132681772/fc3001a8.pdf
    • http://bovagor.smrhoa.net/uploads/1/3/1/0/131071164/velafi.pdf
    • http://files.coachandersonsclassroom.com/uploads/1/3/2/6/132682892/2088248.pdf
    • http://files.stmatthewsvoorheesville.org/uploads/1/3/0/7/130739379/ponagu-wabigivozise.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/furedotuxezetag.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/84623860510.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/16842348750.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/dizago.pdf
    • https://cdn.shopify.com/s/files/1/0439/1544/4379/files/leon_garcia_probability_3rd_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71895705060.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/physics_of_semiconductor_devices.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/pokemon_solar_light_and_lunar_dark_passwords.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0583/files/butler_s_tourism_area_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/fajoketis.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_off00005a6a.bin
461710c46cafd155017d1c3c245cb7f95f591fc01887241e9731fed952bb74ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6A 5892 bytes
font_01_sfnt_off00006e5d.bin
c6500e1edc167e98b5b3c033ab52ec9224fe666e5d0535778079ba77d0950cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5D 10256 bytes

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