Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7a719edf7b7f15…

MALICIOUS

PDF

71.0 KB Created: 2020-08-04 16:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdc28f2d1bae70973a3237a2e08928a1 SHA-1: c648eabca808e9483f16324dc2a6a1851cb322b1 SHA-256: 3d7a719edf7b7f15dcceb2cc3186f9071681d35c62404e90e010e2439aae3f28
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing links to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. While the document body contains garbled text, the presence of the malicious redirector URL and the sheer volume of external links suggest an attempt to lure users to malicious sites or manipulate search engine rankings. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=bored+pile+design+calculation+pdf
    • http://files.saintlawrencewr.org/uploads/1/3/1/4/131408142/nasuxojoz-sobepibex.pdf
    • http://files.bulkbathandbodyproducts.com/uploads/1/3/1/3/131379362/23bd3d32626.pdf
    • http://files.cheongjuguide.com/uploads/1/3/0/7/130776031/wovuworivesobaw-retevibebo-duwesul-jedamikiresapes.pdf
    • http://files.harvieherrington.com/uploads/1/3/1/4/131437484/9d8d01c9dc42.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/zadavagutikinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/8905804414.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/a_certification_study_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/calendario_luglio_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/96866242495.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/convert_to_monochrome.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/research_on_anxiety_disorders_depression.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/mutojajavu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/runadesofinidasom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/42688595998.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/convert_mkv_to_mov.pdf
    • https://cdn.shopify.com/s/files/1/0435/0358/3384/files/28449730758.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/54595172929.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/tamodewevaroxafofukidatu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d915.bin
517cc320c43488129581433723fa0be325de97253bc7424cbba387deee6bf357		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD915 5372 bytes
font_01_sfnt_off0000eb6d.bin
2a88cf5957ab20d786ec2e9abc371465cdcf8ae56a5f6352b4beb41877119614		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 10312 bytes

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