Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5acf4e19cddf28…

MALICIOUS

PDF

33.8 KB Created: 2020-07-31 21:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b409ff8d45501f8210b129b4d1011bc0 SHA-1: 9433d21df0b40bbf8a131de7f3c6ec84edcb3fa2 SHA-256: 5c5acf4e19cddf28f38019bd8741b0f9d947cb14b3126c9e1253e9e4a1ef1fed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary redirector URL identified as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'circuits ulaby pdf'. The presence of numerous links suggests an attempt to manipulate search engine results or lead 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.com/pify?keyword=circuits+ulaby+pdf
    • http://files.golden-meadowlark.com/uploads/1/3/1/4/131408899/gesaxava_vazamowaxarexu_bazozatevag_gimusipebopufo.pdf
    • http://files.letrim.com/uploads/1/3/1/4/131437233/zepovifete.pdf
    • http://files.charlesinfurna.com/uploads/1/3/1/8/131856134/23583.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/28840961749.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/dosirapujavegojakugixiboj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/65776994703.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/jesasoruf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/dugitubimaxi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/62991373600.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/galufezepotuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/83239981014.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78394199391.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/52489643853.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/387060795.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/nibizonanejazirude.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/forin.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/kutolidavikegavawisoji.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048c3.bin
92ca41873b508c760c364cb783a8521e69ae65177b0d3590eb00cce7d7f8a78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C3 5296 bytes
font_01_sfnt_off00005ad6.bin
f4c8d93fc236492618eaec7ff0d71b00769a5f646bf7927d1f8cc01c0baf4b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 9296 bytes

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