Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7a2dafabf8d545…

MALICIOUS

PDF

47.7 KB Created: 2020-08-18 15:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f278da12458b6e45edd397be1269ac6 SHA-1: 2b46f901a568f05c5e685a59924604ec46d69361 SHA-256: fd7a2dafabf8d545b486bf22ab12d9daeda12e99a7cd0bde54e270515ba3e540
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including a critical redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same redirector URL. This indicates an attempt to lure users to a malicious site, likely for further exploitation or credential harvesting.

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=bombardare+di+informazioni+in+inglese
    • http://files.earlsnursery.com/uploads/1/3/0/8/130873971/d597d709.pdf
    • http://vegagika.tucsonconnect.org/uploads/1/3/1/4/131483027/5173727.pdf
    • http://files.cruisetoalaska.co/uploads/1/3/1/6/131606366/dusoxerozadatawojiw.pdf
    • http://files.daniellemerceryoga.com/uploads/1/3/0/7/130776083/dumufoturixato-mirasuta.pdf
    • http://pijuzipo.redtopdesigns.com/uploads/1/3/1/6/131637881/87a537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/70446688794.pdf
    • https://cdn.shopify.com/s/files/1/0435/3766/2103/files/steel_truss_design_in_staad_pro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/brainspace_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/xeruzakewukiselukoremub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/koxizilikovomebemukovotuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8818/files/noboxelinibobura.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/31103930564.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/house_tree_person_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630c.bin
94f395152c0136a7af9aa24376efcd5b26814463cb72a2c5e96ff2ab8db28a0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 5172 bytes
font_01_sfnt_off00007481.bin
367e10f08870b041be40b62f4df0ce0685a7c3a43b46094860ebdf143ff4b91c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7481 15804 bytes
font_02_sfnt_off0000a3d9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D9 4324 bytes