Malicious PDF — malware analysis report

Static analysis result for SHA-256 8202dc3447b8f6a9…

MALICIOUS

PDF

46.5 KB Created: 2020-07-27 04:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6dcc852af44fde76d1ba42a70b4975 SHA-1: f936600cc0a9af3cf9738f3fbe4c291a759ceae9 SHA-256: 8202dc3447b8f6a9646bf6f7a85d2a13ca666218c4df0ca1198ae44106726102
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for distributing malicious content. It also features a large number of external links, many pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute further payloads. The ML classifier also strongly indicated maliciousness.

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=maryland+state+archives+guide+to+government+records
    • http://files.heel-strike.com/uploads/1/3/0/7/130776073/rodosobimerutoxoxo.pdf
    • http://files.praktische-philosophie.org/uploads/1/3/0/7/130776067/d535c894f57a8.pdf
    • http://files.cakemediahq.com.au/uploads/1/3/1/0/131070112/xowotadatixupawam.pdf
    • http://files.brmreps.com/uploads/1/3/1/4/131407977/xugiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8461/1733/files/65240788234.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/sonuwarobaruturexokifava.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/6490035790.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1985/files/dokajesolujomefip.pdf
    • https://cdn.shopify.com/s/files/1/0439/2484/8795/files/faporepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/wipodebokijat.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/gumojunaxedojivamifujukeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/60579535169.pdf
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/nisawomiboselawal.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/powizowexanu.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_off000078cc.bin
e56fed2f8b2d62d7c02489498630101a6e6b58be65f05341d54b0d832888e0ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x78CC 5404 bytes
font_01_sfnt_off00008b0a.bin
fec2a32dd7261f758061a92d1eb6cbff4560f295eefd234d9e5b1809fd8a53f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0A 9800 bytes