Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d3fe31381d89b8…

MALICIOUS

PDF

43.6 KB Created: 2020-08-21 21:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52545bd188cd71a1180820c7f0b27c59 SHA-1: e37baf74e80edb3e04b33ee559986eb1951e1670 SHA-256: 85d3fe31381d89b874f1716f51ce5fa2c70b4ad23646db00d3d5508b45511490
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=aws+cli+the+authorization+header+is+malformed'. This URL is likely part of a phishing or scam campaign designed to lure users into clicking malicious links. The document also contains a large number of embedded links, many hosted on cdn.shopify.com, which is flagged as a PDF link farm. The presence of the malicious redirector suggests an attempt to deliver a payload or phish for credentials.

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=aws+cli+the+authorization+header+is+malformed
    • http://waraj.jessicamilne.com/uploads/1/3/0/7/130776257/2361235.pdf
    • http://files.sportbowl.com/uploads/1/3/0/7/130739986/4037984.pdf
    • http://files.nwlj.co.uk/uploads/1/3/1/3/131380848/sakojaxufekitawitige.pdf
    • http://files.corefitathletics.com/uploads/1/3/1/0/131070291/pibapiwel_mimofavakipux.pdf
    • http://dejedu.martinisimagedesign.com/uploads/1/3/0/7/130740019/8be2b2.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7832/files/ascaris_lumbricoides_ciclo.pdf
    • https://cdn.shopify.com/s/files/1/0448/6434/0130/files/animals_reading_esl_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/ati_targeted_medical_surgical_2016_cardiovascular_answers.pdf
    • https://cdn.shopify.com/s/files/1/0463/1511/0565/files/outlook_2013_manual_archive_settings.pdf
    • https://cdn.shopify.com/s/files/1/0435/7629/5592/files/61274308229.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/gejanojejule.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/xawinipefakuxepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/critical_and_descriptive_goals_in_discourse_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0436/7872/8345/files/gatimeromepevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/equipment_of_arnis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/thick_leather_farming.pdf
    • https://cdn.shopify.com/s/files/1/0458/5432/6937/files/83512113120.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/sasiwet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/68892619818.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_off00006403.bin
3da9e839d7e1f0516e967fa7cfda271ff0747eed0ee484799a68e80eb0793883
pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5392 bytes
font_01_sfnt_off00007638.bin
69c603aecde99bd5adb9f4f3b061a6cfcd1b28229a3bfe233c1612b8463a7c93
pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 13356 bytes