Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9592cdac0771ba…

MALICIOUS

PDF

41.1 KB Created: 2020-08-23 12:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da3ed3f48934a7cdd4574c86ace03db7 SHA-1: 8fe32d6ab2245a79f049d6d401d992e07aa1b313 SHA-256: eb9592cdac0771bada559911840de6a64bb21cf0f6beaf2049f305deea1c9428
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which are part of a link farm. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final destination or to perform SEO poisoning. The document body, though heavily obfuscated, contains the same redirector URL and other PDF links, suggesting a coordinated effort to drive traffic to malicious sites.

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/pify?keyword=crock+pot+multi+cooker+manual+setting
    • http://files.inadocument.com/uploads/1/3/2/6/132681772/pujezawemis-mipopa-mazutomojagor-fuburo.pdf
    • http://files.calliecolifecoaching.com/uploads/1/3/0/7/130775607/627217.pdf
    • http://files.qplusfocus.com/uploads/1/3/0/9/130969204/gilafigofobi.pdf
    • http://files.independencepyro.com/uploads/1/3/2/6/132682607/3289986.pdf
    • http://files.filmingfunds.com/uploads/1/3/1/4/131407051/wimajaxiw_begosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/vebejateralodirizin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/97132184300.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kivamusefelozadadazub.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/waziwuzubaro.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/5856015140.pdf
    • https://cdn.shopify.com/s/files/1/0438/1147/1520/files/documentation_powerpoint_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/37485995035.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/femomevizonebojego.pdf
    • https://cdn.shopify.com/s/files/1/0433/7395/3187/files/best_to_word_converter_online_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/allegro_pcb_editor_user_guide.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_off000063d0.bin
01010feacb7f7429676d8acabad5bc072b4ea19480bcb519b0aa41dc9d9bd2da
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D0 5224 bytes
font_01_sfnt_off00007573.bin
9addcf1dcc31cf77e3dbad8b12dbe507204e252a04b79142fd4cda67d6230805
pdf-font-stream PDF embedded font (sfnt) at offset 0x7573 9992 bytes