Malicious PDF — malware analysis report

Static analysis result for SHA-256 958dfe5a483c8e4d…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 19:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aca4cd365cdf9ac2e75daaa8282fe432 SHA-1: 61749bcef336ed26ed10a95aae04aae353eaf265 SHA-256: 958dfe5a483c8e4d50e04a1a61a494236616c27644641e9f6fd47e958cfa14c4
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'acoustic guitar lesson for beginners pdf' and includes the malicious URL. This suggests the document is designed to trick users into clicking the link, likely leading to further malicious content or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=acoustic+guitar+lesson+for+beginners+pdf
    • http://files.lipscomblaw.com/uploads/1/3/1/3/131384436/sekapixoxajoxizidew.pdf
    • http://files.timeless-transformations.net/uploads/1/3/2/7/132740234/2629e121b899e.pdf
    • http://xenukixi.dbcreates.com/uploads/1/3/1/4/131409090/1daff1.pdf
    • http://files.crescentbaydollfanciers.com/uploads/1/3/0/8/130874482/a06b6841a94897.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/viktor_build_paladins.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/gigomen.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/what_is_a_shimeji_desktop_buddy.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/14999025526.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/2038536984.pdf
    • http://kekakax.my-site-101469-107552.square.site/uploads/1/3/0/8/130814535/baxanoriwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4788/6743/files/kisscartoon_king_of_the_hill.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/gojurup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/larodegexujeduzadusevaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/10712733692.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/racconti_brevi_autori_italiani.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4101/files/6348658966.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/5113687722.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/firilofabuxapawaxe.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_off00006c3a.bin
16e5cb7aa6d8dc0638c4ee646777ce953e2873237b8f0ad1846933bb8a5c7b95
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3A 5452 bytes
font_01_sfnt_off00007ec4.bin
8be0a17918693290812c211fec3800afbe0b62005efba53a2260d65ebe6d7981
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC4 10024 bytes