Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2ff445469de5c1…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 20:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f323ecd06f4951496b01fdbb3bbecc8c SHA-1: d6340ac94c4eacd57f6d66e6a8d0c98778de6521 SHA-256: ff2ff445469de5c16e50a163102f5cec990c0f422e7b4beda2198de77082e1e8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to lure users to malicious sites under the guise of SEO content.

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.com/pify?keyword=backlink+maker+software
    • http://files.wakeupandwritewrw.com/uploads/1/3/1/4/131407029/sexenugubodubib_nedor.pdf
    • http://vuxajude.flintcrossfit.com/uploads/1/3/1/4/131437736/767595.pdf
    • http://files.vivotrainingsystems.com/uploads/1/3/1/3/131383943/ruwuvi_lagozizog_jusibusojutape_fajereguga.pdf
    • http://kowekero.velvetandtulle.com/uploads/1/3/2/7/132741555/4014306.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/40409804633.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/1840_case_skid_steer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/geometry_midpoint_and_distance_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/memido.pdf
    • https://cdn.shopify.com/s/files/1/0438/3031/3122/files/57606082952.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/59855285056.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5675/files/ata_chapter_12.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/articles_of_confederation_activity.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/96294951181.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/begavalinuvuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/jogakebutosisixar.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_off0000707b.bin
7ada43082893f6cf4745b4402b1896bc6d6902825c0c2800c3698c0ed27a6dc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x707B 5232 bytes
font_01_sfnt_off00008237.bin
fde90b31a42541d8727567f2f059c9ae094dac7a42bdb99b3873a6672911c854
pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 9972 bytes