Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a89693344f2e49…

MALICIOUS

PDF

44.6 KB Created: 2020-07-28 08:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de5e981ce11e2ae3ead0accb304e0ce1 SHA-1: 30c35944256b96cd91a23095725c78f88af5c4fd SHA-256: f2a89693344f2e4963215434154ac77121867c1a28412581afa257ce24496a52
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a phishing or malicious redirection attempt, likely to lure users to a compromised site or to distribute further malware. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=catalyst+9500+qos+configuration+guide
    • http://files.thesketchingpad.com/uploads/1/3/2/7/132740424/6854811.pdf
    • http://files.dantealighierimelbourne.com/uploads/1/3/0/7/130776864/togadero.pdf
    • http://files.carversciencefair.org/uploads/1/3/2/6/132681992/biravojogofiwu.pdf
    • http://files.rescohomes.com/uploads/1/3/2/6/132681398/lewew-sigisitano.pdf
    • http://files.rescohomes.com/uploads/1/3/2/6/132681398/lew
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/91165161126.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/42622582476.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/wixarumixudorirubiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/63523964285.pdf
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/bulosalajibapavodamipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/tufilan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/1160239399.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/44781793189.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/murojunogudopovoleke.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/7053091976.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/nalegegeniwefoxeke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.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_off0000707d.bin
82521a87d1320ca453ab029a508be285da486ce345b90861d31bca9dfa145c91
pdf-font-stream PDF embedded font (sfnt) at offset 0x707D 5744 bytes
font_01_sfnt_off00008413.bin
4a269ac6f658bca6783832b689658c39b004cf56ac9103a2e9289f9af28c251d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8413 9644 bytes