Malicious PDF — malware analysis report

Static analysis result for SHA-256 05172f61364349db…

MALICIOUS

PDF

45.0 KB Created: 2020-07-29 18:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e0cd2f015c21324eed288762f23ba73 SHA-1: db051170181bde8aa442fe852bd4a43060b9fe77 SHA-256: 05172f61364349db2c1a816e27e3b3db21910ad442dfadc1c2738e9ea2b4af9f
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to external sites, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to a search query, reinforcing the lure aspect.

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=biafra+war+in+nigeria+pdf
    • http://files.dawnlarsenmusic.com/uploads/1/3/1/4/131453132/panux.pdf
    • http://files.theparklinenc.com/uploads/1/3/0/7/130775171/3644725.pdf
    • http://files.flos5dollarhouseofbling.com/uploads/1/3/0/9/130969755/6183be2e51.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/suvogusonawode.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/2639331736.pdf
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/11294626501.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/71529357732.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/gapize.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/56283748124.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/11449510202.pdf
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/gelurovavabel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73470001672.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_off00007533.bin
167b9aec9e03cd89eec1ac511f0eb0b6a7ba9e622af89d30c5de868fb0d62a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 4736 bytes
font_01_sfnt_off00008557.bin
b6b2e6e42ebd302661b3ebccb99bd949beaee890b96cd9c9f717d195376300f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 9864 bytes