Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddae6023e335372…

MALICIOUS

PDF

42.6 KB Created: 2020-08-11 06:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2240d0242bee57622ed9d7d48b0d71db SHA-1: f19ba3b3762f60bb27bcf530e14f4daaf1c96a9d SHA-256: 0ddae6023e33537253ff1eead1b624335cc6406073845108b9ee7afa0725af4c
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 of which point to what appears to be a link farm designed to host numerous PDF files. One of these links, https://ttraff.com/pify?keyword=bury+me+standing+pdf, is identified as a malicious redirector. The presence of this redirector and the sheer volume of links suggest an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

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=bury+me+standing+pdf
    • http://bawur.viewpointvideos.com/uploads/1/3/1/6/131636725/3496f3.pdf
    • http://xosiwab.happiestwives.com/uploads/1/3/2/6/132696194/aeeb9643.pdf
    • http://files.christopherdiazmosaics.com/uploads/1/3/2/8/132814977/820be49114e89e5.pdf
    • http://files.superiorsupportsrvs.com/uploads/1/3/2/6/132696598/jusetefubaguf.pdf
    • http://files.vincentsgermanshepherds.com/uploads/1/3/0/8/130815228/2997746.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4796/7130/files/bcg_matrix_examples.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/17469693176.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/besenudapep.pdf
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/vibabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/college_algebra_and_trigonometry_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/2985/4368/files/xurametupuvupur.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/nice_select_jquery_dublicate_values.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/24414742806.pdf
    • https://cdn.shopify.com/s/files/1/0447/9139/8561/files/simms_injection_pump_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/bayana_agreement_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/nowugeworikobokilawodoxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/fabake.pdf
    • https://cdn.shopify.com/s/files/1/0431/0430/5303/files/american_revolution_battles_activity.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675a.bin
c77ed7b2f3d32a92695b4671f000591a80842142a3900bf8fce1f461450e3130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 5480 bytes
font_01_sfnt_off000079f6.bin
3100bd256bf8ba32df38f9eded73c9891bd2f39a324cffccbe59df7c62c125f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F6 10404 bytes

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