Malicious PDF — malware analysis report

Static analysis result for SHA-256 993a5f73d26da5ef…

MALICIOUS

PDF

44.4 KB Created: 2020-08-21 12:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b28287c1fefd147b745f8ae6dc613dd SHA-1: e758ceba7f45a1ea1c965f9c70050bdef7012e4e SHA-256: 993a5f73d26da5efff4372300ab82878ac655e6440bb15c61fe94fb4d186b346
170 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the text 'Ac market free data' and the malicious URL, suggesting a lure for free data that redirects to malicious infrastructure. The presence of a 'download button' heuristic further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ac+market++free+data In PDF document text
    • http://juveluveb.352coaching.com/uploads/1/3/2/7/132740353/9cf83f6d58295.pdfIn PDF document text
    • http://files.goodpasturecheerleading.com/uploads/1/3/1/3/131382797/fumuv.pdfIn PDF document text
    • http://sokupafad.crazycanadia.com/uploads/1/3/0/8/130874277/5137901.pdfIn PDF document text
    • http://files.heavenstinyangels.com/uploads/1/3/0/7/130776609/fejozuguzamuliw.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/1/0433/9938/1157/files/zezepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/pebuwanarafowegakixulere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13002849425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/96565111142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/jijuleridufidodemoxuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/play_store_card_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/nesisivirawijawodutisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/tumudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4337/files/62354694411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/56419103161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/86068722209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/71838170628.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000653e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 4536 bytes
SHA-256: 7e640345eb1c9bfc7fa5cb0c746f853002148476dcd86d38ea0fc55e9694b247
font_01_sfnt_off00007497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 10052 bytes
SHA-256: d518f20f29405f133bfa060d44949bb17f198ae11b3f995f583cfbf6b2b7f714
font_02_sfnt_off00009700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9700 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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