Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f6baf9cb367a7f…

MALICIOUS

PDF

36.4 KB Created: 2020-08-02 22:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff38f77450f59b776bce3fccfaa67b75 SHA-1: 544f03a4dc944262f2bd033dafe529640bd2c5b5 SHA-256: 10f6baf9cb367a7f8c98bee8d687abb850a1f347cf017c6fc0b349c5de03e729
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector, suggesting an attempt to phish or deliver malware. The document body, though heavily obfuscated, includes text related to 'Ducks Unlimited migration map' and the malicious URL, likely as a lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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=ducks+unlimited+migration+map
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdf
    • http://xobedibaw.afgelocal1235.org/uploads/1/3/0/7/130775934/madudo.pdf
    • http://files.run4hope5k.com/uploads/1/3/1/3/131379761/5295243.pdf
    • http://files.hickmanfootball.com/uploads/1/3/0/7/130776788/kamubumul-dobozokowobiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/jivaxumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/pabevogen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/93514495719.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/1336543698.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/syndicate_emblem_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28603075132.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/giwezipotago.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/mixifesarapijidukojegamo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/smallville_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/97700027284.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/gramin_nuvi_760.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_off00005018.bin
49b68023d7c10c04506f40d73c4e3048ff5cde106409536c33415c21f465788a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5018 5456 bytes
font_01_sfnt_off00006298.bin
a37f0ca6489c137169c16e3bf8e05e6feaf6fa8a3a64cdbea79aa497500f0f5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6298 10060 bytes