Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b342a54d58a74b4…

MALICIOUS

PDF

45.3 KB Created: 2020-07-28 05:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ace6c462193433e36624e2e3351477ff SHA-1: 85d920317714cca4038b0c23d328380c1d1b143c SHA-256: 7b342a54d58a74b4407412765be518222c33304fdabd03a39af867e3faa2d7e0
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=airline+iata+codes`. The document body, though heavily obfuscated, appears to relate to airline codes, suggesting a lure. The presence of multiple external PDF links, including one hosted on Shopify, indicates a link farm or content distribution strategy. The ML classifier strongly flagged this PDF as malicious.

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=airline+iata+codes
    • http://files.goolsbygreatdanes.com/uploads/1/3/0/7/130776413/balutanuma_wigilugadon_xulezalukaripen.pdf
    • http://files.nikigrewal.com/uploads/1/3/2/7/132740413/9626738.pdf
    • http://files.emstudioart.com/uploads/1/3/1/3/131380031/xebovavokexuwuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/75433873871.pdf
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/42765682907.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/37477042694.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/38172893937.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/92984790871.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/finurimida.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/28244258952.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/jemulubeloji.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/59838615767.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/30338461293.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/jopozox.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_off000068cd.bin
56ace0fd1ede68edad994dd94e2487d748ebf405792f10505c2e9f8e0fd99efc
pdf-font-stream PDF embedded font (sfnt) at offset 0x68CD 4712 bytes
font_01_sfnt_off000078c0.bin
90c347b6bda04e47fc74037e02cb886423f61c603203d2ec9800e2e56f53be73
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 15036 bytes