Malicious PDF — malware analysis report

Static analysis result for SHA-256 69365179549c0700…

MALICIOUS

PDF

66.1 KB Created: 2020-08-02 05:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da8187ec1c698a231353fbdc616da3cc SHA-1: e891fcad96dacd46dcddde48ec41f3d4fd82e783 SHA-256: 69365179549c07006b3cbc6bfe82c46cbc180b8f56921cc766d62b2312cfb29c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF SEO link farm behavior, embedding numerous external links, with one leading to a Shopify domain. The ML classifier also strongly indicated maliciousness. These factors suggest the document's primary purpose is to lure users to malicious infrastructure.

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=%25D0%25B0%25D0%25B7%25D0%25B0%25D1%2580%25D1%2582%25D0%25BD%25D1%258B%25D0%25B5+%25D0%25B8%25D0%25B3%25D1%2580%25D1%258B+%25D0%25BA%25D0%25B0%25D0%25B7%25D0%25B8%25D0%25BD%25D0%25BE
    • http://files.sustudiojewelry.com/uploads/1/3/1/4/131452836/2910236.pdf
    • http://files.ross-lorraine.com/uploads/1/3/1/4/131406269/427d50.pdf
    • http://files.freshbakerydelivers.com/uploads/1/3/1/4/131407051/fitizikoju_pukipe.pdf
    • http://files.jocelyngolden.com/uploads/1/3/1/1/131164440/ruvireladow-nabolegaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/89913420952.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/sowamebejo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/kogulifizunirefum.pdf
    • https://cdn.shopify.com/s/files/1/0434/4270/0455/files/sijirabenedunasak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/dubstep_ringtones_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/49821124364.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/jajuziledawowira.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/kabepaxusudawo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/suxubijolaparitubisir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/78517557721.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/47923412161.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/pozoluk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4640/files/32585626207.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/13653479125.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_off0000b57e.bin
d62cae46ebcafd07545dbec5b7456897de6962a2f03b8f2344da1bd820ae3bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB57E 5312 bytes
font_01_sfnt_off0000c71d.bin
c9cdb49a4f59e0242f7f5dca929a882e2d8adb98ae1919ab0d1277eabe6a0667		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC71D 16204 bytes

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