Malicious PDF — malware analysis report

Static analysis result for SHA-256 110070c59abbe4cb…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 17:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6406d9f16359d75f909ccf68292bf348 SHA-1: 716508c013218fdc02f94f80bb14153a8f8ada65 SHA-256: 110070c59abbe4cb21fcec2963b095886f85607e0a60cd64b7521059b10d9172
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=cardboard+gear+vr+apk'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute content or lure users to various sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=cardboard+gear+vr+apk
    • http://files.slothcore.ca/uploads/1/3/1/4/131437823/56d34e.pdf
    • http://files.jobsforwomenfilm.com/uploads/1/3/0/7/130739415/2819657a2f63.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/67103833549.pdf
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/40214442632.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/accounting_concepts_and_conventions_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/55883461272.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/tuvewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/fusobibetinomesepoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/50054291884.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/xidedutesixukimafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/android_1_all_mod_games.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b61.bin
50362248d759c18c85f9f34c35a985d9f1a71676ef039b3f4cbfaea67e6a3274
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61 5084 bytes
font_01_sfnt_off00006cc7.bin
f74716ce6bc1c59ec48a3c48a835c54e9a822a1f74ab45a624b8f60905df2f42
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC7 10384 bytes
font_02_sfnt_off00009069.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174
pdf-font-stream PDF embedded font (sfnt) at offset 0x9069 16144 bytes