Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8b4e288c5ecbc9…

MALICIOUS

PDF

36.2 KB Created: 2020-08-22 01:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb2ae31b844a69bc966c0559be1a773d SHA-1: c1f0b54e694556262177782dd49cecee0f95808c SHA-256: 2d8b4e288c5ecbc94b83b27a9dbf125dc8518b8bee44346a885d2a5d551855e5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure related to a 'road accident report' and includes numerous embedded links. One critical heuristic indicates that a link redirects to known malicious infrastructure (ttraff.cc). The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the text 'Report on road accident you have witnessed' and the malicious URL, reinforcing the social engineering attempt to trick the user into clicking the link.

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=report+on+road+accident+you+have+witnessed
    • http://files.beyondthedreamingspires.com/uploads/1/3/1/4/131438008/sutagivu.pdf
    • http://zetibe.beccaspeert.com/uploads/1/3/1/1/131164110/9d9d5.pdf
    • http://vekeded.if-airfranceklmva.com/uploads/1/3/0/8/130874524/6003601.pdf
    • http://perixilow.jamesinthecity.com/uploads/1/3/0/8/130813533/fusovewijerav-nisaloxaporela-tufidenip.pdf
    • http://winusadik.apexmartialartsgainesville.com/uploads/1/3/0/9/130969764/1949a06.pdf
    • https://cdn.shopify.com/s/files/1/0428/2423/7212/files/atahualpa_yupanqui_poemas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/dangling_participle_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/bamukukaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/pakubejumobijodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/convert_color_to_black_and_white.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/43234003393.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/talafonare.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/kasewix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/burhanuddin_moula_photos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/zajomutamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/lakimewexupobuji.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_off00005257.bin
5f7a6c5e8b2a44b2aeb7ca109e2197eab93d9be9aa4eeee821da50a02b670fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5257 5392 bytes
font_01_sfnt_off000064bd.bin
563a0b3181bfa38012a813f35c1b146edecab6aaa1d98e8833ffa36edabda99c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BD 9124 bytes

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