Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f912fe94ca101d8…

MALICIOUS

PDF

37.0 KB Created: 2020-08-20 13:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: face58596332f49f2a56bdb34492e03f SHA-1: 38549d08a8b9884d77b0ce18281cde40e8101ecb SHA-256: 7f912fe94ca101d88e7f06ff1a9aa55c25ce37d23261ee219cea21bc03b22a53
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as a download for an Ubuntu ISO image. The primary link redirects to a known malicious redirector infrastructure at 'ttraff.ru'. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link-based redirection attack.

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=ubuntu+16.+04+32+bit+iso+image
    • http://files.ohtheplacestogo.com/uploads/1/3/1/3/131383613/leselimam_sowuwu_ginexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/taxivukewutisipotujudim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/rorimixuxanovekoguzese.pdf
    • https://cdn.shopify.com/s/files/1/0429/0376/5158/files/25233343498.pdf
    • https://cdn.shopify.com/s/files/1/0432/7564/9187/files/bitdefender_antivirus_plus_2017_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/50744431740.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/vajinowawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/print_webpage_to_firefox_addon.pdf
    • https://cdn.shopify.com/s/files/1/0440/0431/1190/files/66025177659.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/34839272943.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_off00005292.bin
55aeb0decb0be4d3b483b587357b826a192aaa5d466bedf81902613d7f4ece65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5292 5772 bytes
font_01_sfnt_off0000663d.bin
74292321a2670729795044e97dcc2880a04ddf043c5953adb899d8df99703586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 9780 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.