Malicious PDF — malware analysis report

Static analysis result for SHA-256 1747f2610ff67a58…

MALICIOUS

PDF

49.2 KB Created: 2020-08-19 16:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16dde831b352074d4267bded8723894b SHA-1: a65da395232f86000ca6024b04905b387ac3e900 SHA-256: 1747f2610ff67a58d08e275b78fb8bf7fbb8ba93e8c11c865194ee5cc584b3f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'asme bpvc 2019 changes pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=asme+bpvc+2019+changes+pdf
    • http://files.the-powerproject.com/uploads/1/3/1/3/131381450/7093696.pdf
    • http://dodab.missbilovsky.com/uploads/1/3/0/8/130814471/wulajadidofawonut.pdf
    • http://files.saintcharlespto.com/uploads/1/3/2/7/132740756/400780.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/wilaxomonenidezumugijug.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/yamaha_outboard_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tovunegorudakumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/tesatudakesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/94560089489.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/72172344947.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/55339660085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/mathematics_grade_10_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/83531290632.pdf
    • https://cdn.shopify.com/s/files/1/0450/3722/4094/files/cisco_ise_2._3_patch_6.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/96372450186.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/tikixinafavizobino.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/lalajufazanefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/82844998262.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e1c.bin
810015cbfdd079be9ffdd65778289f01ed9f8d94f24936348a2dfc8f98a78d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1C 6112 bytes
font_01_sfnt_off000092cd.bin
32aea1b337695a3ca17fdc1d21ec9905acdcd7b1709084de426f0b5bc1cdd0b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CD 11508 bytes

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