Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4f200c1cf3e029…

MALICIOUS

PDF

66.5 KB Created: 2020-07-29 02:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c091fa079156f33c95e21463b4d76029 SHA-1: da3b88628bc361ed8a6647c43cf8a640678ce5bb SHA-256: 0e4f200c1cf3e029a1da98f344429a9c726acbd1f411f0518946109f52c67751
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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=android+javascript+interface+callback
    • http://files.madmaxuk.com/uploads/1/3/2/6/132682627/zizidulok-tejibof.pdf
    • http://files.hangingbetween.com/uploads/1/3/0/8/130873839/ruforapuweti_pagogexuli.pdf
    • http://files.selfhelpfromdolly.com/uploads/1/3/1/6/131606953/2152b8.pdf
    • http://files.readingswithkaren.ca/uploads/1/3/0/7/130739802/memosasajifata.pdf
    • http://files.randybaskerville.com/uploads/1/3/1/8/131871605/8a2dd051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/komimawukapejesawobo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/zizidupakaxamuxinexatepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/14433200515.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/losimudegitidejudiku.pdf
    • https://cdn.shopify.com/s/files/1/0440/7705/6165/files/pijeterir.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/86448271840.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/favumotukavona.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/perabed.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/nomowuzamememavuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/94560520667.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/29951593964.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/lonozulaxufukopuduse.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_off00008d27.bin
c932a8d966e11d22b42d3fbd952827ddc6bbe4aa51884578f0d72deb85eb506c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D27 16140 bytes
font_01_sfnt_off0000c0d0.bin
26af6a9591517ee6cffb3c9576407a82c90f3f8d196609a50c67e2db46ca1593		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D0 5268 bytes
font_02_sfnt_off0000d2c5.bin
09c0c3cea052d1d9d6cfaabd2e179abeda3150acf5a8c96adf9e0a9dd56930b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C5 12844 bytes

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