Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9c5926bafb98c1…

MALICIOUS

PDF

68.9 KB Created: 2020-08-30 23:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f3a3ea7e87163d51c059dc759232e19 SHA-1: 21d8bc3741b4ff33947ea31b75ed559f683c8fb0 SHA-256: aa9c5926bafb98c17e25b8cd2faceb3d04188f15f81db86afc6c45ddb77e85dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=mass+effect+factions, which is the primary indicator of malicious intent. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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/wix?keyword=mass+effect+factions
    • https://static.usrfiles.com/ugd/b8c837_d7325d853eb64f9f80dee39072493c31.pdf
    • https://static.usrfiles.com/ugd/b7ab08_dc4d099ac685480d93d2adf3b5c4f6d0.pdf
    • https://static.usrfiles.com/ugd/9cc572_352c10790f9247c69077642d7cfb9dfb.pdf
    • https://static.usrfiles.com/ugd/05900a_2beb7200b8454399b7f08ccd56cd0d04.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/vakifimuganomiwuv.pdf
    • https://cdn.shopify.com/s/files/1/0460/6446/8123/files/12353174372.pdf
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/joduriraxupojinok.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/solid_principles_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/essentials_of_business_communications_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/saletamabexulaloka.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/zorezimanitogegil.pdf
    • https://static.usrfiles.com/ugd/067ecb_3e820091cdaf4d9fba077cc91d6bfadc.pdf
    • https://static.usrfiles.com/ugd/77941b_ee82c69ae345432b9fb46660772da639.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_off0000d0cd.bin
d13a1270869a0ca53ea7a11c6e20c68f30e94dc15efbbdefad16f8342c719898
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CD 4752 bytes
font_01_sfnt_off0000e10f.bin
4ed6f808a72737f5c0ca7ec01d2fa6eb68bea23b7ab5a789d0361d49ca5be6c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 11096 bytes