Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0ac737fc5aa3a7…

MALICIOUS

PDF

53.4 KB Created: 2020-08-21 23:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d60e8c428944b96418fba44559579a6 SHA-1: dc8c909acbba74b2237d19a78d19036cf0f1f2df SHA-256: 3f0ac737fc5aa3a72eaa3734ad2e9d00a5e5c1f551a06e2498515d3c9a696399
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as "Cambridge 8 listening test 2 answers". This indicates a phishing or social engineering attempt to redirect the user to malicious content. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination.

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=cambridge+8+listening+test+2+answers In PDF document text
    • http://files.davidsonpublishing.org/uploads/1/3/1/4/131438019/livutos.pdfIn PDF document text
    • http://files.anna-needlepoint-pearson.com/uploads/1/3/1/3/131380107/novimuwigedud_kapowixuvakivo_gonanafaxupol_tunoribevu.pdfIn PDF document text
    • http://pigomiliw.daughtersofcharityunngo.com/uploads/1/3/0/7/130776485/2538677.pdfIn PDF document text
    • http://bilun.performingourfuture.com/uploads/1/3/0/7/130775405/vaveserodites.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/1/0438/3758/7606/files/rezozuketifod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/wafigunesafan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/gifawiwakotefigonitituxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/94367082036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/31088010643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/skate_3_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/rufibupefufokojizodilav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/psc_bulletin_november_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/dsm_5_definition_of_mental_disorder.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 1

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_off00008368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8368 5404 bytes
SHA-256: cf4174ac13430616e35406bf8be08b0fba6c78f328cb539ef88ba326c4917ff7
font_01_sfnt_off000095b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B9 10816 bytes
SHA-256: 8a43a74ccc5fdcb2cd96797777b65d63acdc48ad321605121248def623838db3
font_02_sfnt_off0000ba5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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