Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14c3f59c0c2802f…

MALICIOUS

PDF

49.7 KB Created: 2020-08-25 15:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c64a0b4aab131901a1f1420c49cd4e44 SHA-1: cd2a45189e9505d68ad40a9cbd3833d77396f4ee SHA-256: e14c3f59c0c2802f6f510a114dce47846b379c57c5b8dbd777000b21f8c9ca66
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, with a keyword suggesting a lure for programming documentation. The ML classifier strongly indicates maliciousness. The PDF also contains a large number of external links, many hosted on Shopify, which is characteristic of SEO link farm abuse to obscure the final malicious destination.

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.com/pify?keyword=arduino+ide+programming+pdf
    • http://mugul.sycamorefencerepair.com/uploads/1/3/1/4/131438641/wimexixotizera_pixujo_sifoleli.pdf
    • http://files.cmsmusicboosters.org/uploads/1/3/0/8/130874120/semavodaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/vijoguzaludogojukujofufo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/89226969375.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/52296151452.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/keletemuroviruwubaxox.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/95692036548.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/for_honor_valkyrie_gear.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/57945768948.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/cara_file_ke_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/atomic_structure_worksheet_answer_key_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/kubikisoluvuvuxigukukosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/rovolebenufili.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_off000084b0.bin
bbbbed84edd071d0497e42cbb129e0b2b8997bc4e1c376b9e0424377ab699409
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 5140 bytes
font_01_sfnt_off00009614.bin
e1cd9fa3ddef874b17235fbab6aaae3c737d3247bd5d5dadca4cfba34f0385e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9614 10400 bytes