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) First seen: 2026-05-08
MD5: 454836859bc9a5a820c471dd0f561cba SHA-1: 5199b2f15dbb8dbc5eef82759292802aef536004 SHA-256: a8ddbe7028bca2d5d59353d9e3941f573bfae7198d0217ef07a2f6148300055c
242 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.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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
  • 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.com/pify?keyword=reason+for+leaving+your+last+job+answer In PDF document text
    • http://juduj.impressionablemindslearningacademy.com/uploads/1/3/1/4/131407377/josutolomiduge.pdfIn PDF document text
    • http://noraji.classroomcanberra.com/uploads/1/3/1/4/131407995/wanekowutomutav-xobofozopomo-gebagufere.pdfIn PDF document text
    • http://files.acainhomecare.com/uploads/1/3/1/4/131438539/3723467.pdfIn PDF document text
    • http://files.rikabirdcreative.com/uploads/1/3/1/8/131872238/gevalos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/karl_marx_conflict_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/88603125561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/71286463437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosadibevejigavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/fulinitid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/64929918451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/anita_movie_songs_ming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/ginuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/famozuguvatutobonetutave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8B 5412 bytes
SHA-256: b0ac4ba910e73747ac3fdfb6b7340c726188ee954ad271f65986118fc727f0b2
font_01_sfnt_off00007f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F23 10192 bytes
SHA-256: 0143634fd15e103528eca95322c06a972d17b4a8a837f112bd868c30f2f6b812