Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b36df9d5d6f0170…

MALICIOUS

PDF

57.8 KB Created: 2020-08-25 07:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e60d5567434d2b49caf97bfbb7d8d3c9 SHA-1: 6207b36b2c644e2047be02fb2c9154e6aef67137 SHA-256: 2b36df9d5d6f017097a89dc5ba7b67f2d7154e2e2c9310a77993a4b573f9f3d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Crowdstrike falcon supported platforms'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=crowdstrike+falcon+supported+platforms
    • http://files.walthamforestbusinessdirectory.org/uploads/1/3/2/6/132695828/vires-livejurimimoj-razowopepopa.pdf
    • http://files.listenthreads.com/uploads/1/3/2/3/132302859/33daf8da07064.pdf
    • http://files.allitteratur.com/uploads/1/3/1/8/131871745/zisiz-nugizuxapuzo-mijed.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/71372233438.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/aneurisma_bone_cyst_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/que_es_el_aprendizaje_visual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/canon_in_d_violin_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/tutugoselujasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9481/9484/files/salemunavozejukuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/govivevobovelax.pdf
    • https://cdn.shopify.com/s/files/1/0450/2516/5470/files/mosexubon.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/fsx_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/57519773311.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_off00008ae6.bin
25bb6af23f13582ff8da07be747dbd6cf3dd7f0091ddce50250f02407a45d71c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE6 5364 bytes
font_01_sfnt_off00009d23.bin
d9b0e3951d3956b936e85c6130945515ffc6997b4da1e81b5fd71f247e2688e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D23 12364 bytes
font_02_sfnt_off0000c554.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
pdf-font-stream PDF embedded font (sfnt) at offset 0xC554 16036 bytes