Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ca4823cb45dfa7…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 20:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 896e27c1785cecdce1d6d7f8c367ce41 SHA-1: fce1426850365c0deb67eb79bfe4b7f286dd22e2 SHA-256: a1ca4823cb45dfa78a4de301a41baaef6a01b7e168c303cefd03721b4980d35a
194 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to manipulate search engine results, with a primary link redirecting to a known malicious URL (ttraff.cc). This indicates a likely attempt to lure users to a malicious site, potentially for phishing or malware delivery. The document body, though heavily obfuscated, contains the text 'Accounting concepts pdf download' and the malicious redirector URL, reinforcing the lure. No scripts were extracted from this sample.

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=accounting+concepts+pdf+download In PDF document text
    • http://files.pierceforum.org/uploads/1/3/1/6/131606162/1987591.pdfIn PDF document text
    • http://files.antigonekoutalieri.com/uploads/1/3/1/4/131408572/gonijugagoba.pdfIn PDF document text
    • http://files.emmakjebe.com/uploads/1/3/1/3/131383949/saderavuzosalek.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/1/0428/3065/9751/files/71968128395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1008/7317/files/retujexofeziremelatugix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/jojaboja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/75305503172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/github_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/72105699779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4496/9365/files/cambridge_igcse_computer_science_programming_book_for_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/39949558995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/aakash_aiats_question_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/binapuxanufefafepisikix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/63468454135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/risasolural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/mibuluv.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 4

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_off00005de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE5 5308 bytes
SHA-256: bd9da68ecbe93d8a2d92656b24613a729c33f0a8c9176a99de737f519e6160ee
font_01_sfnt_off00007025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7025 10164 bytes
SHA-256: 3d9533da6e82d0d2ac2104538286d170381cabb0f2c654728a501965466ceac8

Open this report in the interactive analyzer, or submit your own file for analysis.