Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d877a1954322d34…

MALICIOUS

PDF

45.3 KB Created: 2020-07-28 16:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76ce8f1a56b2d51a1977c5cef39e933c SHA-1: 3d59883e4b419c53bc1c30cb2500d08348238602 SHA-256: 5d877a1954322d343cd3c2b65f0a2f899a3a41bc7c0c0c92bbe75e92a8d46d61
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector infrastructure designed to lead users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to game downloads. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a phishing or scamming attack pattern.

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.ru/pify?keyword=battlefield+3++free+pc
    • http://files.weecansign.com/uploads/1/3/2/7/132740814/xififir-wufabebasezuw.pdf
    • http://files.pongdeelab.org/uploads/1/3/0/8/130813639/7832761.pdf
    • http://files.lucymortonmusic.com/uploads/1/3/0/7/130739991/zusupepe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/finudet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/99388984165.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/kozisoxomipagado.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/33623103731.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/nuzevav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/43109260864.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/nexukumegujizogidim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/53531785786.pdf
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/vevum.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/35981591088.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_off0000757a.bin
1d803e2bdef1d97a640c9a4c8be998023f17eef68bcf90ff32b507732cddf411
pdf-font-stream PDF embedded font (sfnt) at offset 0x757A 4756 bytes
font_01_sfnt_off000085b2.bin
931ddbc0099496316eea083575359189e14742276b387fc2709265fec4d65066
pdf-font-stream PDF embedded font (sfnt) at offset 0x85B2 10228 bytes