Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b570e86c5e08fae…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 08:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b0f5ef4d709f62df597035b60a56526 SHA-1: e71a7c2a5be7c23c80b924e45582ec8af8ec4697 SHA-256: 2b570e86c5e08fae78e1c6b676913ec78fb6b6b964f70fba7c5f18f972f74b10
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This link is presented within the document body, disguised as a download for 'Whatsapp messenger for android'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, some of which host further PDF files. The presence of a visual download button heuristic further supports the lure-based attack pattern. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=whatsapp+messenger+for+android+2.+3.+3
    • http://files.ruinsofmodernity.com/uploads/1/3/2/8/132814977/mubuvuzuriw-miligute-visexuriwodi-midovetawa.pdf
    • http://files.freebirdcollectibles.com/uploads/1/3/1/4/131455832/xunusomukoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobuwavidojanunixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/20443938197.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/vafinaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2736/5031/files/adobemaker_add_in.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/mick_jenkins_martyrs.pdf
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/44974709969.pdf
    • https://cdn.shopify.com/s/files/1/0451/4054/1593/files/calendario_2020_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/29982683450.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/vocabulary_jobs_and_professions_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/short_story_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1025/1176/files/vexetulonesaluv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/flow_chart_template_microsoft_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/vurabezawobalejurivomejub.pdf
    • https://cdn.shopify.com/s/files/1/0437/6884/0353/files/dp_animation_maker_with_serial_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/m16_blueprints.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_off00005fb0.bin
1db26c5e3ca5bda19526e396d57a10d0f259dd132a091a3d7c34661eadfff533
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB0 5764 bytes
font_01_sfnt_off0000733a.bin
0b61dbfa5dafb486ad027f52d450be87b892601587e1834d5da40578dde5ded1
pdf-font-stream PDF embedded font (sfnt) at offset 0x733A 10292 bytes