Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8e4035505c9bf5…

MALICIOUS

PDF

51.1 KB Created: 2020-08-18 23:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0de1ae6e86560058f08aeb1603877df5 SHA-1: 1e75434463ca1bd2749a549a4c8a95ab37bdcbdb SHA-256: ea8e4035505c9bf51ab55f4c51542159a8b578afa8ac61ed33d0c4909df40b10
152 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a 'workplace safety inspection template'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=workplace+safety+inspection+template, which is designed to redirect users to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=workplace+safety+inspection+template
    • http://files.michelefolliscreates.com/uploads/1/3/2/8/132814476/wovuz.pdf
    • http://xutegiki.hi-dtheatre.com/uploads/1/3/0/8/130814328/lusegezuduwof.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/nemimiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/83967438638.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/92333896775.pdf
    • https://cdn.shopify.com/s/files/1/0452/7511/9778/files/49146004901.pdf
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/27050674042.pdf
    • https://cdn.shopify.com/s/files/1/0432/9560/4891/files/caravan_palace_lone_digger_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/disuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/19373886978.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/910969512.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/warhammer_40k_codex_space_marines_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/88711689916.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/mtg_set_order.pdf
    • https://cdn.shopify.com/s/files/1/0433/9551/4535/files/image_and_likeness_of_god.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_off00008bc2.bin
cd07db04a025326fe9bad3c3931566ea6d57dc9b2b3e25f69f89ef9d81963e5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC2 5340 bytes
font_01_sfnt_off00009ded.bin
b77dd0c843372cbd6fe98a7925c183a7c20f66330fe741348dc8d4d2ebd5f806
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DED 9888 bytes