Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1b60a5b8b2b746…

MALICIOUS

PDF

44.6 KB Created: 2020-08-22 08:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b49bc81e8dbb1f7181450a6d1d93d8fe SHA-1: 6e39e120715ad129716905d4e5c0d7c00bd4b833 SHA-256: 1c1b60a5b8b2b746f9c366caaea3db35651fe32526e6ffbd332ba5e629ea2c12
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword suggesting a lure for educational materials. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with link-farming techniques used for phishing or malware distribution.

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.ru/pify?keyword=beehive+9th+class+book In PDF document text
    • http://tapumoda.kinneycountygcd.org/uploads/1/3/0/8/130874493/4ce97.pdfIn PDF document text
    • http://tatevak.thelight.org/uploads/1/3/2/3/132303338/1463817e7599.pdfIn PDF document text
    • http://files.southforkprovisions.net/uploads/1/3/0/7/130776819/vosanisoniwegedel.pdfIn PDF document text
    • http://pifibeluz.tinctureoftimellc.com/uploads/1/3/0/8/130873947/baponise-jemugizo.pdfIn PDF document text
    • http://files.debbietuepah.com/uploads/1/3/1/6/131606094/noxef-xefeniwufutew-validizasuxoje-rebusag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/never_back_down_ost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/7925529683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/dewubolubidip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5792/9623/files/finale_notepad_2012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/el_nacionalismo_musical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/movimiento_armonico_simple_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/aeneid_lombardo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/new_antimalarial_drugs_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/vertically_opposite_angles_worksheet_grade_5.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_off00006634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6634 5260 bytes
SHA-256: 4d9348ab0881afef16331a39dee4ecf9b3287848c2aa1577909a88aef5c8cd89
font_01_sfnt_off00007818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 9956 bytes
SHA-256: 28b5674ded3929e26abda414d42c0810f5760091817932faf0e01149250d57d1
font_02_sfnt_off00009a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A87 2748 bytes
SHA-256: 9728a24ebd3faa82a0e45625fd261104bd7d479353b96a361d0c84e56246789d

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