Malicious PDF — malware analysis report

Static analysis result for SHA-256 58124f9a135e2597…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 14:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efcdd11b34f8b689e119087652710a8d SHA-1: b21553c92fd4b730c8c00407540e723cb92c3db6 SHA-256: 58124f9a135e25974c39afeda6365e30e6d4b907fecac808a89980b199c5c978
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body itself is largely obfuscated but contains a reference to the same URL found in the redirector link. The presence of numerous links, many pointing to a redirector, strongly suggests a phishing or scam campaign aimed at directing users to malicious sites.

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/wix?keyword=i+ve+got+sunshine+in+my+pocket+lyrics
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/61406850412.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8816/files/wowazowupiwudituwam.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/kadokufiwamizakokujepapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/44612605343.pdf
    • https://static.usrfiles.com/ugd/0511f5_0151008ded5d44ba95a1e4527dd9c74e.pdf
    • https://static.usrfiles.com/ugd/b7ab08_235b2a87ab5b41e9889c1640af0c8035.pdf
    • https://static.usrfiles.com/ugd/8b2c09_0ada9cf491f34c3da27fa3f3c5dfc124.pdf
    • https://static.usrfiles.com/ugd/3f4b99_2061538d760f409fb8e2f3b81b170891.pdf
    • https://static.usrfiles.com/ugd/4b874d_cb5bb7bbc2b248618133ac8f7ea2a773.pdf
    • https://static.usrfiles.com/ugd/b8c837_e26fdb7c845846f9941cd61456e8736b.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/acrobat_editor_free_download_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/moluwuzub.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/22774282720.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005168.bin
6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x5168 2952 bytes
font_01_sfnt_off00005bf5.bin
72e218563f2c82cc191b3c1184dd3576f39e51c57fb415a0cfb90ca76012e041
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF5 5300 bytes
font_02_sfnt_off00006de3.bin
6f16c41c1923223c10bdd304192b35371999354cd409a510095c74e809176aaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE3 10384 bytes