Malicious PDF — malware analysis report

Static analysis result for SHA-256 4475dead5e27a108…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 20:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f43b9ad6814136f65514bc903f09c64c SHA-1: aec9826d1aa57a1a21a75faacb5be79cd76b7e7d SHA-256: 4475dead5e27a108b330d9221cbb688da411f6bec4e589cf139e7bd1cfea3106
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a link farm of other PDFs, indicating a phishing or redirection attempt. The document body text, though heavily obfuscated, contains the initial lure URL. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=yesterday+weather+report+in+dharmapuri In PDF document text
    • http://files.traceynjohnson.com/uploads/1/3/1/0/131069887/saxex.pdfIn PDF document text
    • http://vufiw.fowlplaylanyards.com/uploads/1/3/0/8/130874493/7620447.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/1/0433/6658/0382/files/kekobolibowugofuwomiguluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/kingdoms_of_amalur_reckoning_dlc_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/17051031241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/levunoxupemutuvarowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/agricultural_economics_books_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/35468148430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4253/5574/files/former_smoker_icd_10_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/apprendre_l_espagnol_livre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/lokopixizejotibulozum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/pamagomuxafavalokobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/cerita_pendek_anak_bergambar.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AF 5320 bytes
SHA-256: 03246773de7aa58648fa97855f00a48ecc046290b203dc63c70876b48a08083e
font_01_sfnt_off00006aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAF 14272 bytes
SHA-256: d51be8f2b86b08cb7ff69ce34e445cf51cf00667803a40394c145f83d955b887

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