Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77b7c0b15d54332…

MALICIOUS

PDF

71.8 KB Created: 2020-08-31 04:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e95978285cc68969498e3325f693e16 SHA-1: 0512aa1d29b6e97a30521539ea76461e06818aa0 SHA-256: b77b7c0b15d54332e02a19a822cac70f285a46bdd6bc540b1904b7c1e012fafe
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=street+fighter+black+characters'. Additionally, the document body contains obfuscated text and a reference to this URL, suggesting an attempt to lure users to a malicious site. 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.ru/wix?keyword=street+fighter+black+characters
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/bugisoxibofemakigudix.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/75990095233.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/34127482567.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4311/files/81252260776.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/akon_blame_it_on_me.pdf
    • https://static.usrfiles.com/ugd/430cb2_484016c80c2d4fa68c6483feba530bd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_59695fcc05a440de9294fc6648cc2293.pdf
    • https://static.usrfiles.com/ugd/b8c837_c932625d6e78453ca8ecbc84a2ade8ea.pdf
    • https://cdn.shopify.com/s/files/1/0460/3615/6575/files/to_kill_a_mockingbird_full_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/7076/7513/files/ruzobelazefewore.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/adobe_acrobat_xi_pro_crack_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0438/9414/5176/files/mathematics_project_work.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/trends_in_neuroscience_and_education.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/songs_of_mzukulu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/55376354588.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c97.bin
d83ed68a2e913f81ea18b6b452d664194b4f64fd4f37a6758e76b9f670172cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C97 11124 bytes
font_01_sfnt_off0000c176.bin
9468668eb51b020d23e72977dc9f93a8f940f0f5e9155af1f1dddaaa4e486ca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC176 5024 bytes
font_02_sfnt_off0000d29a.bin
10e18b8ad69fe25cf7bc6decc1f27fc94d7a1976d88bc8a1580a3ec47a32fc01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD29A 15836 bytes
font_03_sfnt_off00010358.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 4324 bytes

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