Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f74bc98401f471…

MALICIOUS

PDF

40.8 KB Created: 2020-09-08 16:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef9044876a9d309e75a561f19dee38d5 SHA-1: ee560b2eb2b622593cd9a0e269c8483e9f778573 SHA-256: f4f74bc98401f47195f5243803a8c767cdc90b8f593c6fb724b267f31e9f14c8
152 Risk Score

Malware Insights

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

This PDF document was identified as malicious by a machine learning classifier with high confidence. It contains a large number of embedded links, including a redirector link to 'ttraff.club', which is flagged as malicious. The document body and embedded links suggest a lure related to a "waste of time song" to entice users to click on the numerous links, likely leading to further malicious content or spam.

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.club/pify?keyword=waste+of+time+song
    • https://static.usrfiles.com/ugd/c20ea7_e563d47776f24e2d8c260f372e13e9ae.pdf
    • https://static.usrfiles.com/ugd/aff7ca_daa8f15b86ed4e7fa94e51487a07f9e2.pdf
    • https://static.usrfiles.com/ugd/e32576_ab62204d60bc489f9f854c05dcd90d84.pdf
    • https://cdn.shopify.com/s/files/1/0436/5690/4869/files/detroit_become_human_android_led_color_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/sebupan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2659/files/14457736268.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/79128568792.pdf
    • https://cdn.shopify.com/s/files/1/0435/6138/6147/files/79881809400.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/the_magnetic_mastermind_kit_free_dow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1538/0892/files/tatalaksana_asidosis_respiratorik.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/gijoxit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/ordered_pairs.pdf
    • https://cdn.shopify.com/s/files/1/0463/3493/5201/files/camtasia_estudio_8_full.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/kilev.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_off0000633c.bin
67633be13b04001c22d9681350864a7a5c4dc8234d65149c6ebe42256953979a
pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 4972 bytes
font_01_sfnt_off0000742a.bin
44f1116e258660abf6db6a247a3c2b2744fc3f171094d0f5906a8e59a0228cb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x742A 10156 bytes