Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddeaf6782a5a380…

MALICIOUS

PDF

48.9 KB Created: 2020-08-18 13:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbeedcab10c9ffb03cf11df048aa01a5 SHA-1: dc2eabfbcba6a32878962b94f1de6ee8d3474fc2 SHA-256: bddeaf6782a5a3800b58a41e45b888bb614d08000a713af5ed183d781aa79384
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirector URL and several other URLs hosted on Shopify and other domains, which are likely part of a link farm. No scripts were extracted from this sample.

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.ru/pify?keyword=anemia+falciforme+na+bioquimica
    • http://files.codeelectricmqt.com/uploads/1/3/1/0/131069824/nerorovumapopifukoki.pdf
    • http://naxoke.bylaurenholmes.com/uploads/1/3/0/8/130814328/rutewivi.pdf
    • http://files.blissfulbecomings.com/uploads/1/3/1/8/131871625/95e49ead4c6bc5b.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/gofepuxozirejuniwum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/bisphosphonates_induced_osteonecrosis_of_the_jaws.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/integral_of_trig_functions.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/vujonisowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9463/7734/files/exercices_amplificateur_oprationnel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/bemikepufegigomeno.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/fejimaguwezafirijuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/70151032747.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_off00007b2e.bin
5daae351f02f6bdac0ff4e823453a158b1825c7503f30cee1e2389708635e792
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2E 5104 bytes
font_01_sfnt_off00008c74.bin
2ca796465a75e34ebb33e46a900e5a3a8c5d8ef494c299ee2fde5183a13ca10f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 13516 bytes