Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59fdb67e05d8e7f…

MALICIOUS

PDF

50.3 KB Created: 2020-08-25 05:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee02cafdb6b9f12541e10b424b0b6b03 SHA-1: 69e4351d6473678e3d293754f7f23402a3de97f3 SHA-256: f59fdb67e05d8e7f65315933fc88c2ba7d3c097b8f8e868b7e59ac0a3406dd68
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, forming a link farm. One of these links, https://ttraff.ru/pify?keyword=ijazat+old+movie+songs, is identified as a malicious redirector. This suggests the document is designed to lure users into clicking through a chain of links, ultimately leading to malicious infrastructure.

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.ru/pify?keyword=ijazat+old+movie+songs
    • http://files.smokefreeottawa.com/uploads/1/3/2/8/132815123/8490502.pdf
    • http://files.montenegroadventures.me/uploads/1/3/2/6/132682868/58da6ed4de57.pdf
    • http://zetade.mariettasquarefarmersmarket.com/uploads/1/3/1/0/131070382/fajoxomejajej.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/70719092249.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/zibezon.pdf
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/adverbs_of_frequency_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/wiguzeliwibujunarig.pdf
    • https://cdn.shopify.com/s/files/1/0434/3690/0504/files/free_printable_birthday_invitation_cards_templates.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/xikimazesobomadoneba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/brother_driver_dcp-_l2540dw.pdf
    • https://cdn.shopify.com/s/files/1/0436/7482/8953/files/12990477854.pdf
    • https://cdn.shopify.com/s/files/1/0437/1929/5131/files/quantitative_aptitude_practice_set.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/4045129847.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/bexexopewukepifa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5171/files/muxuviguvutuparigad.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_off00007cb3.bin
5598eb58f0700017ff191ed45b201c5b4fdb9ec25cdce42f1e132d45bfed9fc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB3 5172 bytes
font_01_sfnt_off00008e54.bin
b43b45da569f8b2011e4b51a93706130059efab8c79865bf87619851cbc5c0ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E54 14632 bytes