Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4d8cddc8370e47…

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 07:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b722459530c46c47083c12fee0eb1c8 SHA-1: 6dcea72b0e745647e47917ee36197d107bd536f7 SHA-256: eb4d8cddc8370e47bfc11b125af4da477abd1aee9f8e7d298f215c223b1ca8d9
234 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing to a URL that appears to be a lure for nutritional information. The document body, though heavily obfuscated, contains the same URL and text. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, some of which are hosted on potentially malicious domains. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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=avena+quaker+manzana+canela+informacion+nutricional In PDF document text
    • http://bafaz.patriot-armory.com/uploads/1/3/2/6/132680848/kotoweg_kibutikezuf_rozezopuwo.pdfIn PDF document text
    • http://vijawupun.transformationalastrologyandtarot.com/uploads/1/3/2/6/132681862/7fe904380c9.pdfIn PDF document text
    • http://files.ccifcyprus.com/uploads/1/3/0/7/130739012/128f43ad.pdfIn PDF document text
    • http://files.tonivuc.com/uploads/1/3/0/7/130776381/nawevaxakuzidevod.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/1/0430/9221/3911/files/casebook_in_child_behavior_disorders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/wetabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/31752045310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/aoe2_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/83823792643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/bazodijabat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1038/1208/files/fallout_new_vegas_mod_pack_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/wisixejox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/34122976560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7836/6872/files/reraxilixebof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/elementary_set_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/56434737593.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_off0000663b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663B 5140 bytes
SHA-256: 91eb2e0810ea0dca25226602746efe4009d09d5e84c49f14ff008e7b7a4fe63e
font_01_sfnt_off000077b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B3 11372 bytes
SHA-256: 14ca84f8916e9e0f43632c270c7680f80dbf544624155fdac531dfe3335cadc1