Malicious PDF — malware analysis report

Static analysis result for SHA-256 3540c77a2562ab5e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-11 15:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05b3825e732d84418ff5337114ab998e SHA-1: 0ba012ea5008aaf9378251f42fb6df6016692b35 SHA-256: 3540c77a2562ab5eb4961f4bc2e61de7265d38819dfff53c39b2365956f24756
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=dissertation+acknowledgements+examples+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same lure text and URLs, suggesting the primary intent is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=dissertation+acknowledgements+examples+pdf
    • http://files.mayapurtrip.com/uploads/1/3/1/8/131856430/dozatofidudekim.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • http://files.dedosdoamerica.com/uploads/1/3/0/7/130739202/mirebafiw-nufuzele-fulimajedavawaz-ropaguzilileja.pdf
    • http://files.dominikfuss.com/uploads/1/3/0/9/130969220/mizanopukew-fukebirubaru-wusojutaruwez-fijiwimiv.pdf
    • http://files.staplespsychology.com/uploads/1/3/1/0/131070792/gorematokatovo-winedekoludi-rinidi-kumuwulonewalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/luwujifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/72966199591.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/jajezebasiro.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/gaxoregumaxakepixuwulu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7709/7886/files/75739954982.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/25996672461.pdf
    • https://cdn.shopify.com/s/files/1/0428/1224/4134/files/nisosolatubade.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/examen_algorithme_corrig_st.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/47047128755.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/rutopejujopegemotemaruz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/assessing_listening_and_speaking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/jumafupatifof.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_off00006755.bin
e340e779b46edcd0b170a28676a08578b0b47e4cf9896a61b074858a6353eed5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6755 5696 bytes
font_01_sfnt_off00007ac2.bin
8a6b3866d11c7d5e4b6324ae1b71218d69160bbfdc01703b66dd69d82cb0c4bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC2 9980 bytes