Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3ab721a81759b8…

MALICIOUS

PDF

42.6 KB Created: 2020-08-22 17:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be49121f200d0a0595af6d935d531713 SHA-1: 6f41b5bb8db7f56ec14a718d9955d99bea3af521 SHA-256: ab3ab721a81759b8e57c7d16531b8507dfa533bfc824345674673ad66e232302
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to loan agreements and the malicious URL itself. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to distribute malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=secured+loan+agreement+template+free+uk, which is likely used to redirect users to a further malicious destination.

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.cc/pify?keyword=secured+loan+agreement+template+free+uk
    • http://files.macscanteen.com/uploads/1/3/2/6/132695586/2fb9f77d2b580ca.pdf
    • http://files.hewittfarms.info/uploads/1/3/1/3/131380767/didirezo.pdf
    • http://files.crestlinepto.com/uploads/1/3/1/3/131398323/laponajuke-lamajawe.pdf
    • http://files.teachenglishstepbystep.com/uploads/1/3/1/4/131452922/kuvoz-goxalozozavubif-fogujonupovidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/aprender_frances_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/nafeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/70316492727.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/bihar_board_model_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/jaxigunurepibavipakofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/mekawimanixabadikarafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/javipilizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/59308486813.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/viluke.pdf
    • https://cdn.shopify.com/s/files/1/0432/9642/4096/files/skf_thrust_roller_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/sefegubebutala.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_off0000673a.bin
a77f71149cb6912f4e38355fb8a9183135fc15ed67b5b8c76f72c9d14c946568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673A 5464 bytes
font_01_sfnt_off000079b6.bin
00c47e2e204e81f57059a36f991e6babd3cdc2954e78e2cca825f7d788d3f665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B6 10472 bytes

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