Malicious PDF — malware analysis report

Static analysis result for SHA-256 da93dd6fff30d0d0…

MALICIOUS

PDF

46.5 KB Created: 2020-07-18 20:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9deec0a311d82d3e58915e17034fc636 SHA-1: 832d7df603130d96b38cc71f2e4192cf3ffa2f7b SHA-256: da93dd6fff30d0d0fc477b206976f0f3d2fd5ae5a3a9bcfbad43957b94e7849c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to lead users to harmful sites. The 'PDF_SEO_LINK_FARM' heuristic further suggests a large-scale distribution effort. No scripts were extracted, but the presence of malicious links is sufficient evidence for the attack pattern.

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.com/pify?keyword=trastorno+alimenticio+rumiacion+pdf
    • http://files.eins-sci.com/uploads/1/3/2/7/132740958/mutipan-rugugewijad-devumegav-moxenaketifis.pdf
    • http://files.erinmillermassage.com.au/uploads/1/3/1/8/131871648/segolafed_kenewakopap_wofabeposaragok_sezigepuxazali.pdf
    • http://files.360signs.com/uploads/1/3/1/8/131857565/850683.pdf
    • http://files.uncconsultingclub.com/uploads/1/3/1/3/131383681/2626560.pdf
    • http://files.carolannliaros.com/uploads/1/3/1/4/131438611/4423510.pdf
    • http://files.wiganhandyman.co.uk/uploads/1/3/1/4/131406480/72e3aa57bc3e55.pdf
    • http://files.caro
    • https://pefowewepev746757978.files.wordpress.com/2020/06/gorogijeviruxazexe.pdf
    • https://sudumol.files.wordpress.com/2020/06/nepesodurizota.pdf
    • https://suxeniruwip.files.wordpress.com/2020/06/71685493870.pdf
    • https://feruvef.files.wordpress.com/2020/06/fosoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/4632059318.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/21176399377.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/zakolu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/luwogonazifutepabawaluto.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/xupoperowuxovin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65233410578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/37138472585.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/74601805570.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_off00007749.bin
7228220f45b0ae9e70315740819546ac6ff3a95e52f5fc6039aa28de20269d73
pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 5132 bytes
font_01_sfnt_off0000889b.bin
0d6504d5dbd57003de0be09ec25f414ea644a54c86cf5a9e9957b5e95e8d1047
pdf-font-stream PDF embedded font (sfnt) at offset 0x889B 10584 bytes