Malicious PDF — malware analysis report

Static analysis result for SHA-256 102a7e42495df7f6…

MALICIOUS

PDF

39.7 KB Created: 2020-08-13 08:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66a9f80087d1b1a52d09454a00b29bc4 SHA-1: e6c59e1918f397a42deae92c4d5844c804baea70 SHA-256: 102a7e42495df7f6425ab30a45215b29419343e201806aada4bb4fd1018af5d6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.cc/wb?keyword=pensum%20idiomas%20uasd%20pdf'. This redirector likely leads to a phishing or malware download site. The presence of numerous links, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation, potentially to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=pensum%20idiomas%20uasd%20pdf In PDF document text
    • http://files.riverviewcharterschool.org/uploads/1/3/1/3/131380345/3f6e0434cd0.pdfIn PDF document text
    • http://files.communitymobilemarketorders.com/uploads/1/3/1/4/131438228/sebafexulutulek_figop_bobalipagu_masazinos.pdfIn PDF document text
    • http://files.fvmediacenter.org/uploads/1/3/0/7/130739780/42e15762d04a71.pdfIn PDF document text
    • http://files.benningtonbaseball.net/uploads/1/3/1/4/131454352/8730b5829cc.pdfIn PDF document text
    • http://files.anchorseminary.org/uploads/1/3/1/8/131871466/nefegutobus.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/1/0433/5150/7094/files/sekopabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2014/7112/files/sijonekovuvotipanazitase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/69045002707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/xalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4607/6565/files/lakovadubudepolamegazuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/23222874385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/96564955386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2208/2460/files/46971750904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/brand_identity_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/42617717559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0241/3735/files/autobiography_of_mahatma_gandhi_in_odia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3A 5060 bytes
SHA-256: 70fed8ea1f1331cffc0e0f8cc44ef93445553fd6b8d1b7334a88fe5a3f66376f
font_01_sfnt_off00006e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 10568 bytes
SHA-256: d8b0d227e26a74edfa7eb6ff69f63b75c70edd62fc1cf2d9c0be78cfa385d72b

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