Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3cb4d1dd224e78…

MALICIOUS

PDF

63.2 KB Created: 2020-08-13 12:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bcd37bdfdc08a4645d42f1b460e73a2 SHA-1: 005c810b6aeb3bda9b82af72a42bdd306502517a SHA-256: 4a3cb4d1dd224e78d50218fd5e08fde4f4315782e0f7895df3cb758a59e7c903
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to `https://ttraff.ru/wb?keyword=online%20books%20pdf%20urdu`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to `cdn.shopify.com` and other domains. The document body contains the malicious URL and appears to be a lure for users searching for online books.

Heuristics 3

  • 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.
  • 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/wb?keyword=online%20books%20pdf%20urdu
    • http://jovupeje.sylviezannier.com/uploads/1/3/1/6/131606289/zilumun.pdf
    • http://files.themrjband.com/uploads/1/3/1/8/131856713/serawulu.pdf
    • http://files.kassandraheap.com/uploads/1/3/2/6/132695662/kopifopija-jenesabiru-bujapolalig-semigubob.pdf
    • http://varajoj.cdrayofhope.com/uploads/1/3/0/8/130814328/596fe18cd39156.pdf
    • http://napupas.christiansciencecrystallake.org/uploads/1/3/1/0/131070450/c6783f16ddb4.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/modiwutimedalazijifepi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/actividades_autoestima_nios.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/82762638448.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/xukaxefemijabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/addison_wesley_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/mapabawatexogelibepeme.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/85969920700.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/suvibafoxixibukajati.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/4630896247.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/b_r_automation_studio_4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000acd4.bin
a0f571d9448d104dceb3cd706f20f2ab70df1a4eeb70e6a1962157c18c828a78
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xACD4 29388 bytes
font_00_sfnt_off0000791f.bin
8a79f922c1272e9a1182a63eccb90d420ef7e42e098d2f8f2f07327648f0724f
pdf-font-stream PDF embedded font (sfnt) at offset 0x791F 4860 bytes
font_01_sfnt_off0000899d.bin
8be6c3e21818aa2d1639ad5ea23987e28547aaab0fd2a52fa88bdb601c69fe69
pdf-font-stream PDF embedded font (sfnt) at offset 0x899D 10220 bytes
font_03_sfnt_off0000e12a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE12A 4324 bytes