Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1d32937923749e…

MALICIOUS

PDF

44.8 KB Created: 2020-08-16 12:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e0600ac8e1d294b3a569f3850f86548 SHA-1: b2e8f01aa18d459da68a09c3ce179e29c71e8319 SHA-256: 7c1d32937923749ec7ce98cfc4484186ed16bdaf5370f64b486f464198d3a23f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.cc/pify?keyword=nice+guidelines+ctg+interpretation+2014'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains hosting PDF files. The document body, though partially corrupted, contains the same URL and text as the link, suggesting a lure for users to click through to potentially malicious content. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or malware distribution attempt.

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.cc/pify?keyword=nice+guidelines+ctg+interpretation+2014
    • http://files.murraysfoolsdistilling.com/uploads/1/3/1/4/131411596/7626508.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/urticaria_angioedema_anafilaxia.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/89575711069.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7423/files/95652578757.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/jodunutukawew.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/bioavailability_bioequivalence.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/88833941109.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/98512673389.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/adobe_flash_cs5._5_serial_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/mumaxerajidesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3660/files/convert_to_word_ocr_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/bejosetanupir.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/pupedojudumezavepo.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_off0000636a.bin
e3112b76d7ad9dd489db6824a9f6a130b629498f2d41d2cef95b5b49aa2a97f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 5504 bytes
font_01_sfnt_off0000762c.bin
8ef2c777c9be29255caaad84321b0e24d57de87759176e6f8eea4e55d1b175a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 10020 bytes
font_02_sfnt_off0000986a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x986A 4324 bytes

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