Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5777c3c84d92c45…

MALICIOUS

PDF

47.2 KB Created: 2020-07-25 19:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84dfea36174e6f3a9b8d5133fa53707b SHA-1: b42c717eb8a7d54d3d9b66683cd972deb4305c71 SHA-256: a5777c3c84d92c45c32c06107db4a786a6c8efca7372eb915fd227046a91d14c
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, pointing to ttraff.ru. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

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=languideci%25C3%25B3+que+significa In PDF document text
    • http://files.lejolijardin.com/uploads/1/3/0/8/130874627/fikepo_kigagofumuv.pdfIn PDF document text
    • http://files.brooksidepineriver.com/uploads/1/3/2/8/132814415/e9eb96e8f70431a.pdfIn PDF document text
    • http://files.whiterabbitdesigncompany.com/uploads/1/3/0/9/130969051/317ffa71.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/1/0427/4431/6070/files/17852003875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0642/5248/files/tajiromexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/16886219667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/32525315170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/weniwisewuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/nuximifasofisuboniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/56769806892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/lofakufekopulene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/61825062742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/duwudevugimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/webozavuxobozesupokuk.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_off000078e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 4956 bytes
SHA-256: a8ea31d4f3648e16cb92120efff23daffc0279a6d16bab492247f4cd79a6e707
font_01_sfnt_off000089cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CC 11176 bytes
SHA-256: 6061471c70672f1101382a96eae3322869fae2401eb9eedfce540d5056949e49

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