Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a113d2078c654b…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 13:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d1bc79047128c57851c2cc2032f297b SHA-1: 1596c34e2a6fe04e156fbc06b7f2e17f6f68c74d SHA-256: 11a113d2078c654bc5b3b88cfbd4eb48c1b15c32e0282a85e6b5cc612911d7af
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector service. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the 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.cc/pify?keyword=other+words+for+guided
    • http://files.cedarviewbaptist.com/uploads/1/3/1/1/131163667/3044702.pdf
    • http://vekawomu.tripointlutheranparish.com/uploads/1/3/0/8/130873851/pomavikox.pdf
    • http://files.brianmorrisphotography.com/uploads/1/3/2/7/132710795/37695fa0640.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/gross_beat_fl_studio.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/dejipovuveboxafuvabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5803/6889/files/vafovoropakitawagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/77894760590.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/55940834116.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/daribobanelop.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/english_to_spanish_offline_dictionary_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/85148385029.pdf
    • https://cdn.shopify.com/s/files/1/0439/5103/0430/files/4464885716.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/82523361183.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_off00006625.bin
e7510d91639649c3a6125cd60919748357264f44e81930b43f8c5c6982c6808d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6625 5044 bytes
font_01_sfnt_off0000775d.bin
341231507a820098a8a2405dd8b96dd0721e02242b0a4030924a0a675f9c97b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x775D 10584 bytes