Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff7cdc6b989532a…

MALICIOUS

PDF

66.6 KB Created: 2020-09-11 15:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7245254d5f74e3aeeb590196f8a5846 SHA-1: c18ae114b7597dcf1a6ad5143e348620866d77ef SHA-256: 9ff7cdc6b989532ab0ddd1b291b1fb830cafd510fe6fef2db0cd17e3d0d590a0
152 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, pointing to `https://ttraff.me/wix?keyword=jnc+guidelines+for+hypertension+2018`. This URL is presented within the document body, suggesting a social engineering lure. The presence of numerous other external PDF links, many hosted on potentially compromised domains, further indicates a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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=jnc+guidelines+for+hypertension+2018
    • http://files.stevemungrouplistings.com/uploads/1/3/2/6/132681863/1726184.pdf
    • http://futamip.occidentallodge436.com/uploads/1/3/2/8/132814742/d992e8421a.pdf
    • http://wukiza.avoicecrying.com/uploads/1/3/1/3/131380158/8f86c.pdf
    • http://nawivexeb.primarytackle.com/uploads/1/3/2/8/132814838/rikazukufekukezudobe.pdf
    • http://wigalu.yahweh-yahshua.com/uploads/1/3/1/6/131637016/5210735.pdf
    • http://files.votelogan53.com/uploads/1/3/2/7/132741476/jedafivejalam-gasope-sexinax.pdf
    • http://vagomax.bridgecreekfd.org/uploads/1/3/1/3/131379605/f4d5ba3777513b7.pdf
    • https://cdn.shopify.com/s/files/1/0438/4250/2818/files/android_apps_do_not_update_automatically.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/fields_of_barley_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/pukojuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/baal_veer_ki_film_hd.pdf
    • https://cdn.shopify.com/s/files/1/0460/0001/3479/files/cecile_chaminade_automne_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/guided_meditation_for_chakra_balancing.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/dixoveji.pdf
    • https://cdn.shopify.com/s/files/1/0436/6611/2662/files/56415129720.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9384/files/81969127225.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_off0000c6b2.bin
06f5ba681509eb663c40a6f59a34f454890f2fc0a7f46c33c221d79b120c18a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B2 5820 bytes
font_01_sfnt_off0000da96.bin
5fb41431a120ce25e6bccce73e280fd8d02cacc6b85fe1c41d256824f86c282c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 10140 bytes

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