Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7fef5c0e3f624b…

MALICIOUS

PDF

52.8 KB Created: 2020-08-31 21:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8f726a475ad74ad736b61c2113b9d39 SHA-1: 913de90eeb5a898f2d0102cf0e61a1a37869cabe SHA-256: ec7fef5c0e3f624bc02a068a3055ffc94f1cfc6bed336c75abcd5416897a9056
152 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.com'. Additionally, it features a PDF link farm heuristic, indicating a large number of outbound links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.com/pify?keyword=s+a+f+e+full+form' is the primary indicator of malicious intent, likely serving as a gateway to a malicious site.

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=s+a+f+e+full+form
    • https://cdn.shopify.com/s/files/1/0438/3421/2509/files/audacity_software_cnet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/hybridization_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/catholic_encyclopedia_1913.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5555796470.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/42902208200.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/standard_specification_for_chemical_admixtures_for_concrete.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/atorvastatina_efectos_secundarios.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/sikagulutafijivubujit.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1079/files/graphic_design_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/12040427472.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/buku_belajar_saham.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/55750629260.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/84331826129.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rupiv.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_off0000889c.bin
1ae69339f070c7385c06db2e3bfab23faf967f479d4bd3633b89d67154a9b79b
pdf-font-stream PDF embedded font (sfnt) at offset 0x889C 4836 bytes
font_01_sfnt_off000098fa.bin
ebdf8a9159f4bf8bb5c49a35b3f4f0f6734690665e276596bc34821fa0f218d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98FA 14384 bytes