Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e610c766a815c2…

MALICIOUS

PDF

34.1 KB Created: 2020-08-18 23:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf93955bda54cc4888431863474d42f SHA-1: 15dd28075d7839ca7fcd0a3875eaa17d09b22052 SHA-256: 15e610c766a815c2ddf472c5f5208b712fb4d4b7b5410d565b478bfaf2ba8559
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to distribute malicious content or manipulate search results. No scripts were extracted, but the extensive use of external links suggests a watering hole or SEO poisoning attack pattern.

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=argentina+flag+gif
    • http://files.concertinaman.net/uploads/1/3/1/4/131452840/xevowa.pdf
    • http://files.hurstgreenshires.com/uploads/1/3/0/8/130873839/6812142.pdf
    • http://files.urlingfordchildcare.com/uploads/1/3/1/0/131070859/216161.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/murir.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/fopexoviludaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/kijewuxejivofulezoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/jukelasobobebarudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/12921189577.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/xarudetusolosivixaberan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9626/8193/files/tukosuwugalofaxivo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0447/4834/1399/files/quantitative_aptitude_questions_and_answers_for_ssc.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_off000048fb.bin
ad00dff90518e2cc7b036bae35fdbeb015ae927c097003dfb382391bcba1148d
pdf-font-stream PDF embedded font (sfnt) at offset 0x48FB 4744 bytes
font_01_sfnt_off0000592b.bin
9da54a38d23ff7868ad8f673422482073dc1dc5d5443c6a624ce1889919c4ea5
pdf-font-stream PDF embedded font (sfnt) at offset 0x592B 10272 bytes