Malicious PDF — malware analysis report

Static analysis result for SHA-256 134598e9b2f3f7c3…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 16:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb66e6401f5eed8b649ba80dbedf2a8a SHA-1: edd58cac9b0089f9423ed6f4f0af7be1fc8994b4 SHA-256: 134598e9b2f3f7c37ef0d5b6a8b69940d98c5151e4904eae9565dc3dc91f096b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to a 'debit card application form' and includes a link to a known malicious redirector, ttraff.cc. The document also features a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/pify?keyword=application+form+for+debit+card+canara+bank+pdf
    • http://files.discipleshipacademy.com/uploads/1/3/0/7/130776460/konatupizoxepo-zevifuguku.pdf
    • http://lumumitu.pinkdreamsinc.com/uploads/1/3/2/7/132740541/1109339.pdf
    • http://files.tntchildcare.com/uploads/1/3/2/3/132302924/silidosuwakomi-vomid-mufeduruvare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/asfixia_perinatal.pdf
    • https://cdn.shopify.com/s/files/1/0441/3734/9272/files/saxon_calculus_solutions_manual_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/24937117935.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/5396015905.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/xamaxegapijes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/4589301162.pdf
    • https://cdn.shopify.com/s/files/1/0428/8479/2479/files/61896798897.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/3708272639.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/87138016980.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/3508074272.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/99583490924.pdf
    • https://cdn.shopify.com/s/files/1/0449/3859/2424/files/principles_of_effective_business_communication.pdf
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/dewareguwudugupemika.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/41123599570.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e5.bin
7e41bfc194b3c1bc7d0191f791d85cf57c7a10a54d3cbf4b0df6455ff0ce2910
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 5104 bytes
font_01_sfnt_off00007416.bin
3c11e1138d974f986a1927af82713ff1b8b72fbcdd8560f326721377c4901946
pdf-font-stream PDF embedded font (sfnt) at offset 0x7416 10504 bytes
font_02_sfnt_off000097f0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x97F0 4324 bytes