Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b39c36cbad79c91…

MALICIOUS

PDF

38.6 KB Created: 2020-08-15 04:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 58667205a469fd198961e2e842d5cef2 SHA-1: 47b8880e146a0102bc88c8c722fde13bbd91940b SHA-256: 4b39c36cbad79c918d88fdcad4deb72969684d468cbab1c2e0cc58ffbaee5fd7
194 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external links, indicating a link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=air+mass+source+regions+answer+key'. The document body contains obfuscated text and references to 'air mass source regions answer key', suggesting a lure to trick users into clicking malicious links. No scripts were extracted, but the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/pify?keyword=air+mass+source+regions+answer+key In PDF document text
    • http://pepodot.ladiesofdistinction2012.com/uploads/1/3/0/7/130776677/7fbca4f77a7003.pdfIn PDF document text
    • http://files.judyireneharney.com/uploads/1/3/1/4/131438464/ferowodidorefanaza.pdfIn PDF document text
    • http://sukujamun.whakamaramaschool.com/uploads/1/3/1/4/131407995/bixasavaduron-dizize.pdfIn PDF document text
    • http://files.poodledynasty.com/uploads/1/3/2/8/132814071/kovawafadalimazogegi.pdfIn PDF document text
    • http://files.radleyhorton.com/uploads/1/3/2/8/132815063/wiwol.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/1/0427/7826/3718/files/ragdoll_summoners_war.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/posusixasuduveponaxif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/mike_jones_back_then_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/21263706986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/wings_of_fire_book_in_malayalam_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9590/6721/files/45727755469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/19995058360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/pobifevasip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/84504104846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/10183890773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0280/5917/files/fagerhult_group_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/99234334240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4531/3941/files/fire_mage_leveling_talents.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
🗂 Part of campaign: poodledynasty.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000584f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584F 5332 bytes
SHA-256: 2623f8641b509216e859a6d78300c8e505e315936915e28280a2b937a1b4d2cb
font_01_sfnt_off00006a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 10228 bytes
SHA-256: 8010c035efbcb595cc3e56d15558b47c0a491eda846007915cabf99ee9d69707