Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ae17193493f33d…

MALICIOUS

PDF

42.3 KB Created: 2020-08-06 20:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0e444c51947d240f40529909759c4d1 SHA-1: 20ce6f2dede2766a7be1b10c4f8f9a74b944eff5 SHA-256: 14ae17193493f33d1b2eec74ae40d59d321c075f2f60e419c69471d007c30408
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be to direct users to potentially harmful content via the embedded links, masquerading as PDF downloads.

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=alimentos+plasticos+pdf
    • http://files.bosschart.com/uploads/1/3/2/8/132814465/4361139.pdf
    • http://files.bayterracesadoptablock.com/uploads/1/3/1/3/131383889/8599472.pdf
    • http://zefor.theroamingfreelancer.com/uploads/1/3/0/7/130739415/xiforegaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/4440321354.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/39350746663.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/tudinijudibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7786/0516/files/pibugeje.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/davudoxalifupogukisajon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/lusabogaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/wazenebufajupepojajexun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28603075132.pdf
    • https://cdn.shopify.com/s/files/1/0430/1363/6259/files/67890853619.pdf
    • https://cdn.shopify.com/s/files/1/0434/3614/6855/files/82585726970.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/zimabopalamugarukipusile.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/sugonejidopalil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/denedomazakubunepuvawozen.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_off000065e4.bin
e8ba98f671055f11d3ffb3fe8d8b3f77e4e32e2b9c76eb7b11cda5441a62aaca
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5196 bytes
font_01_sfnt_off00007782.bin
c29738b52f0fdd5c178c751f6d1ae06525432fca7d0266d94acc4acdf2df071c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7782 11392 bytes