Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2318422b599a321…

MALICIOUS

PDF

35.8 KB Created: 2020-09-08 15:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182a949bea0c8c371f45e170a61b2097 SHA-1: 0fc8428b8e865c60a94bdd11669459897ca3bb6b SHA-256: d2318422b599a3217c1a0086cf2a2de712e71f2e638d337acc5b0e1e301f2667
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to 'ttraff.me', indicating a likely SEO spam or phishing campaign. The ML classifier strongly supports maliciousness. No scripts were extracted, but the presence of the malicious redirector URL is the primary indicator of compromise.

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.me/wix?keyword=hydro+turf+sheets+canada
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/little_star_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/moleluxifuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/xebapujep.pdf
    • https://static.usrfiles.com/ugd/9f2514_f2dd03dd72b442d29b4d986176caa30b.pdf
    • https://static.usrfiles.com/ugd/7ff653_49cb9ac4c06b4d978cfc018c4cd62706.pdf
    • https://static.usrfiles.com/ugd/b8c837_774e34e6324e41a6bbdb3a5d74b2e37a.pdf
    • https://static.usrfiles.com/ugd/78c764_b58b6ca2a6d147179ad8742a5b4d4d4d.pdf
    • https://static.usrfiles.com/ugd/ac72e0_11fa624ceb154a5aab76d3111db3adc1.pdf
    • https://static.usrfiles.com/ugd/e00bd3_ec17a5db70fb4ddeba58ae1ec74655a0.pdf
    • https://static.usrfiles.com/ugd/575363_575667c644f24d0895df7e42a7364576.pdf
    • https://static.usrfiles.com/ugd/bb4607_0166fb3d647b470ba75e4653d620ca03.pdf
    • https://static.usrfiles.com/ugd/035627_6e7aa7dd07d24d67bad2abcd0b86386f.pdf
    • https://static.usrfiles.com/ugd/b8c837_02d3e4587d254423a7fbd95ea432ab12.pdf
    • https://cdn.shopify.com/s/files/1/0438/8775/5432/files/nutricion_bypass_gastrico.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/2997/files/97017015721.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/word_document_to_converter_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/online_application_form_1093.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_off00004d5b.bin
b070340f318f068666e644b9ac1fb73317fcc5f00aeef35d103b5a5708446b89
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5B 5140 bytes
font_01_sfnt_off00005edd.bin
14a180a736bc2625ea2098d4ef11e72521acdaab9cef23e5261ffb7d98f902ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDD 10292 bytes