Malicious PDF — malware analysis report

Static analysis result for SHA-256 7031bd80f56b4fbd…

MALICIOUS

PDF

56.8 KB Created: 2020-08-18 15:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c1a14b4ec5bf50bae870ccda8e0c2e5 SHA-1: 5ac7fe116f41a31db29dea93b03d6fe30ca4a442 SHA-256: 7031bd80f56b4fbd6af368ace69bb6a9922a2d4cb5a9317eb3dba8cd3ca7c8c3
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document, likely intended to lead users to a scam.

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.cc/pify?keyword=android+notification+auto+alert
    • http://naxizijeb.fireprotect.me.uk/uploads/1/3/0/8/130814328/702623.pdf
    • http://files.coutellerie-le-cellois.com/uploads/1/3/1/4/131483217/zugabelirede-gefesigovuda-febuw.pdf
    • http://files.adventurerunningco.com/uploads/1/3/0/7/130740212/f88527119359.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/pdf_file_reader_app_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/18542393739.pdf
    • https://cdn.shopify.com/s/files/1/0439/3182/8379/files/85988840777.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/24532208883.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/3ds_max_2020_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/kamodebosuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/nunopetavo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/tinkers_construct_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/68700845165.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/5574006286.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_off0000a016.bin
87a280a52904c48b658fdf6520ff00d74e3a95f1a2e966d72b99b1ef878cf1c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA016 4828 bytes
font_01_sfnt_off0000b085.bin
27bb8baa8b82c475cd9ab0ec49077d44ca3dbe1fd3a661aafd3808bb841cfa5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB085 11392 bytes