Malicious PDF — malware analysis report

Static analysis result for SHA-256 5911dc1a4a3e36cc…

MALICIOUS

PDF

48.2 KB Created: 2020-07-31 22:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 103af9ea35bcfeb6da5f31bb23a3a4d5 SHA-1: 467e902e1ae921e4d2944509e419b218166a3778 SHA-256: 5911dc1a4a3e36cc467b71b7bdbbb17633c47b42571d07fa036f79b00f295bed
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm behavior, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=enumerate+function+python'. No scripts were extracted, but the sheer volume of links suggests a watering hole or phishing attempt designed to lead users to malicious content.

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=enumerate+function+python
    • http://files.kansasturfgrassfoundation.com/uploads/1/3/1/4/131453028/1096425.pdf
    • http://files.wigwampalmdesert.com/uploads/1/3/0/8/130873810/49f8fbd.pdf
    • http://files.bundleitsg.com/uploads/1/3/1/4/131438418/wiwumo-tuvotugi.pdf
    • http://files.kerrydavies.net/uploads/1/3/0/9/130969426/fivaxivowopidi-votemajenupefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/getewovutixurepovumadita.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/21434749031.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/64918143756.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/patabuvomalosufujera.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/tijimatovur.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/tomizuvisidegegixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/zabamesujuzefasugolaleme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25843483079.pdf
    • https://cdn.shopify.com/s/files/1/0432/6290/2438/files/jumozudimexuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7678/files/sifijeloko.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/24587364956.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/vugarobafisudog.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/kavajavegumowewoxu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ccd.bin
c865c5d4f8cc80742f948989af92bddf13f3674dc945755d81aa2484ca6c4222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCD 5104 bytes
font_01_sfnt_off00006e06.bin
2cc53fe92377cceda7df9abc9d17e500b842d7ca124d6361eb7ef9eb28a4391d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E06 2736 bytes
font_02_sfnt_off00007927.bin
932368f88695b80d832b0ac2e19d2bfd228171dd2ad877575f20a8ff5ce1b7d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 10604 bytes
font_03_sfnt_off00009d7a.bin
ba315a33ca5f34634dba43de2ca8fa6f1e13f04c8a513309d0baf4f99f1d0f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7A 16364 bytes

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