Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b08b1361a3f3b1…

MALICIOUS

PDF

48.0 KB Created: 2020-08-03 16:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cfc97bcf062bec350f136c99035f1f7 SHA-1: d3f15eb0cbd95e413c3aa793a37ba803c2872f65 SHA-256: 16b08b1361a3f3b1cb1f9f7a2cdcb1413fd7d999bcd15adab8390d63b6a4ba9a
194 Risk Score

Malware Insights

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

The PDF contains a link to 'ttraff.com' which is flagged as a malicious redirector, and the document body text mentions 'Acrobat reader 9 password protect pdf'. This suggests a social engineering lure to trick users into clicking the link. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=acrobat+reader+9+password+protect+pdf
    • http://files.mytornradiofud2modelproject.com/uploads/1/3/1/3/131380337/jaxexiditapid-tusux.pdf
    • http://files.tacomodogtraining.com/uploads/1/3/1/6/131606113/52722ca.pdf
    • http://files.alisoncowan.co.uk/uploads/1/3/0/7/130775331/6200084.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/46989487088.pdf
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/girinilemaleposazaselu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/jozibogu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/kaxugadedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/winusekobabudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/zazevojafunanezopisasanoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/vofavuzepodal.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/68217026804.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/97468685909.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/wutiboxobirigazagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/91943540437.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/17258405638.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008228.bin
c7a962da633e7746edbbe642594a65717271fadc7528ec5446bd42e010bd4407		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8228 10072 bytes
font_00_sfnt_off000070a8.bin
0fbf1453192b8a725be4f8b1320ed72c7039f6e81223b2b09baf28fbc76f8001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A8 5128 bytes
font_02_sfnt_off0000a481.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA481 4324 bytes

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