Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6622506de6c675…

MALICIOUS

PDF

60.3 KB Created: 2020-08-25 02:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d853187e6e8698ee0eea139c04d8fb SHA-1: cfc35c0babdfb2b205a64e139168a006868ec923 SHA-256: 5b6622506de6c6754df9a055dd0dc3597073b431fff8a9d0776972d153ef7247
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for an advance-fee scam. The document body, though partially corrupted, contains text related to 'cv template gratis word' which serves as a lure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, including a malicious redirector, supports the advance-fee scam classification.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=cv+template+gratis++word
    • http://wigumipev.drrjbattechiropractic.com/uploads/1/3/2/6/132695615/1421714.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/83641121596.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/america_settentrionale_riassunto.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/59750586492.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/pocket_oxford_american_dictionary_thesaurus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/53173314116.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/zazizobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/2333704084.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/68165524537.pdf
    • https://cdn.shopify.com/s/files/1/0441/2715/8424/files/cassava_flour_production.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_off0000adbd.bin
6f7a6ad145191042bc00b664078ec142b59d06d15d2c2ba9d3aa7e2bb931aa23
pdf-font-stream PDF embedded font (sfnt) at offset 0xADBD 5336 bytes
font_01_sfnt_off0000bfe0.bin
c462db7c9567fcb557c323a433a088d6da266f1f30dd6c4c56de078ebfad17ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE0 10864 bytes