Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8096502fdcaabad…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 04:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea853be178f04482675ca747af4cd4c SHA-1: 27d0899f6f41b9588366f607fae3e2beef49ea9c SHA-256: b8096502fdcaabaddc91962d77362ae1a74c8fe84e9547e865830b5d426a5252
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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=atoms+isotopes+and+ions+worksheet+answer', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a PDF link farm, with numerous external links, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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=atoms+isotopes+and+ions+worksheet+answer
    • http://files.cherokeeiowahistory.com/uploads/1/3/1/6/131636737/keruduwulilix.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/ratek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/griffon_corporation_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/pugujas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1898/4352/files/16557459674.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/wavaguz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/56542533414.pdf
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/vefude.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/regofejizor.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/25357075245.pdf
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/97284033207.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/68295197261.pdf
    • https://cdn.shopify.com/s/files/1/0433/6664/5916/files/dragon_ball_z_dokkan_battle_lr_androids.pdf
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/56527683507.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_off000075fa.bin
7ffdd27dcb013380895dd36f148ac7397450f01b396a1d3ed57c6ca883d69ef9
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 5312 bytes
font_01_sfnt_off000087e9.bin
9a1d0fe01605e5b27414ce12b010229b6a9c772803b986a684e1d6547598132a
pdf-font-stream PDF embedded font (sfnt) at offset 0x87E9 13676 bytes