Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f735ce6fbd3cba…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 12:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c489fe7df719a48ec7f7bebb55615ab SHA-1: b036d158b2d23e22d015e4d666d22148e4516219 SHA-256: d7f735ce6fbd3cbad708b6a974634d5def4c9a2d501295af616d4e63713c3466
194 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded links suggest a lure related to 'lds sunday school lesson manual 2019', but the primary function appears to be a link farm distributing numerous PDFs, with at least one URL pointing to a malicious redirector. The file is likely part of a phishing or malware distribution campaign.

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/wb?keyword=lds%20sunday%20school%20lesson%20manual%202019 In PDF document text
    • http://files.icerandw.com/uploads/1/3/2/6/132695813/1063741.pdfIn PDF document text
    • http://files.oregonlumberworks.com/uploads/1/3/1/4/131406337/nibamexemevam.pdfIn PDF document text
    • http://files.disarmingdoomsday.com/uploads/1/3/1/4/131453022/37638d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/8557430465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/bowaraviwoxutizojamasuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/rdr2_evelyn_miller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/17648039704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/massive_attack_i_against_i.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/doragewotupepefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/diwatuxexarevono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/kibusodaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/amazfit_bip_english_manual.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 5360 bytes
SHA-256: 6a95b0e62ec6be25fab2f88af36482d877b19dbc2807c66104faf53a4d6f4af2
font_01_sfnt_off00007436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7436 10252 bytes
SHA-256: b71bc4ebf524ad69ed0620e6757b5a1e67c2bf18a209b79211a28339910c45d1
font_02_sfnt_off000096fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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