Malicious PDF — malware analysis report

Static analysis result for SHA-256 02911f1824bda1b6…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 07:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beea4c3b02faf24ee486f90cdcb44a2b SHA-1: 7281384270af06e579438e3542f07783229ca5b2 SHA-256: 02911f1824bda1b6088a71dd291f4e759d7606a6a6bc134f6582d1ef3fb28885
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link redirects through 'ttraff.ru', a known malicious redirector, and the document body itself contains this URL and other PDF links. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=7+wonders+of+the+world+pictures+with+names+pdf
    • http://files.comprehensivewellnesssolutions.com/uploads/1/3/0/9/130969469/dae5e9c46feb92.pdf
    • http://files.keelancole.com/uploads/1/3/1/6/131606291/3092989.pdf
    • http://files.southshorehomebirth.com/uploads/1/3/1/4/131482886/rakasujodavufajuzoga.pdf
    • http://mekovijed.confidentlyuare.org/uploads/1/3/1/8/131871462/7059024.pdf
    • http://files.thebirdiebox.com/uploads/1/3/0/9/130969689/nemoseju_rovozifunasul_numuraxoku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/albuterol_inhaler_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/rilanodawawuguki.pdf
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/welara.pdf
    • https://cdn.shopify.com/s/files/1/0434/1265/2194/files/ritunozijerudoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/5022/9143/files/51232060693.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/pirates_of_the_caribbean_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4996/files/teposawigibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/btl_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/nubatej.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/43826167705.pdf
    • https://cdn.shopify.com/s/files/1/0435/5126/0836/files/a_swap_partition_contains_a_filesystem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/6932377875.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064b8.bin
fd37c874f67e2e54bb705c045950810d0a19cd1f860fc8eff8c21ecb4ad703af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B8 5472 bytes
font_01_sfnt_off0000773e.bin
d0285236864845d109af63a4d422bdf1f6fd89f0ff6fdcf2cce94bc5ea5dc556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 12836 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.