Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada8091754553c88…

MALICIOUS

PDF

44.2 KB Created: 2020-08-29 21:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecde2d29514bb67d924f39c769a675d5 SHA-1: ef9abf4bf063df6dfdee573d3938bf89b4a3a32a SHA-256: ada8091754553c887dc8bb7d5af9206a6456036bf62287dbeae108fa47bc77cf
154 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, which is also present in the document body. This link, https://ttraff.cc/wix?keyword=lettering+guide+template, is designed to lure users to malicious infrastructure. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact 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.cc/wix?keyword=lettering+guide+template
    • https://cdn.shopify.com/s/files/1/0437/6923/3557/files/capitalismo_socialismo_e_democracia.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/condom_size_guide_durex.pdf
    • https://cdn.shopify.com/s/files/1/0462/9279/5552/files/45168522694.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73477439cc14087a76c724466a4ec3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_17b78b56bf864fa5aabb15aa48659938.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f6107fba7ee425ba769464669ef6d58.pdf
    • https://static.usrfiles.com/ugd/b8c837_394a5068d7e449e1b1c9c88527e82da4.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/poulan_chainsaws_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/2129/5003/files/32907226586.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/fixitazelapit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/58364944508.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2577de5a0e44cbc9f981bb7adcfa6f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_7965b7021d734b74bcf01906dc02aa5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4d5a3f40d5e4d52bc93b49c16d61ffc.pdf
    • https://static.usrfiles.com/ugd/b85eb0_41fa480755ff491294374b2884ce9ed2.pdf
    • https://static.usrfiles.com/ugd/b8c837_adcbfd0dd84c46919f0b95b7516ae856.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_off00006f75.bin
e2b0380cad97e3736ff3d929dc5c31f52027c3f27d93853f57b2b0bb776680bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F75 5040 bytes
font_01_sfnt_off0000807f.bin
5b8fd9e4b9ea6a33ceab9f0c2f5fc88a9e9b761f6f67a266862e33885bb13467
pdf-font-stream PDF embedded font (sfnt) at offset 0x807F 10700 bytes