Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ddbe7028bca2d5…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 16:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 454836859bc9a5a820c471dd0f561cba SHA-1: 5199b2f15dbb8dbc5eef82759292802aef536004 SHA-256: a8ddbe7028bca2d5d59353d9e3941f573bfae7198d0217ef07a2f6148300055c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to job searching and payment, indicated by the 'SE_INVOICE_LURE' heuristic. It embeds numerous links, with one pointing to 'https://ttraff.com/pify?keyword=reason+for+leaving+your+last+job+answer', identified as a malicious redirector. The document body, though heavily obfuscated, contains fragments of this URL and references to job-related queries, reinforcing the phishing pretext. The presence of multiple external PDF links suggests a link farm for SEO manipulation or traffic redirection.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=reason+for+leaving+your+last+job+answer
    • http://juduj.impressionablemindslearningacademy.com/uploads/1/3/1/4/131407377/josutolomiduge.pdf
    • http://noraji.classroomcanberra.com/uploads/1/3/1/4/131407995/wanekowutomutav-xobofozopomo-gebagufere.pdf
    • http://files.acainhomecare.com/uploads/1/3/1/4/131438539/3723467.pdf
    • http://files.rikabirdcreative.com/uploads/1/3/1/8/131872238/gevalos.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/karl_marx_conflict_theory.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/88603125561.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/71286463437.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosadibevejigavo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/fulinitid.pdf
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/64929918451.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/anita_movie_songs_ming.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/ginuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/famozuguvatutobonetutave.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c8b.bin
b0ac4ba910e73747ac3fdfb6b7340c726188ee954ad271f65986118fc727f0b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8B 5412 bytes
font_01_sfnt_off00007f23.bin
0143634fd15e103528eca95322c06a972d17b4a8a837f112bd868c30f2f6b812
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F23 10192 bytes