Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22ea7642c28c3ce…

MALICIOUS

PDF

46.5 KB Created: 2020-09-30 14:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c1e4c5207da8c492ff1cba1b060f33d SHA-1: 57809a4216315850b88e71a67a4c52b0c3821ea8 SHA-256: f22ea7642c28c3cea7e2a4ac801edf675e04d8b638980b046f5a15a8c9b42f4a
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised with a keyword related to peace agreements. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this malicious intent. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, suggesting a broad attempt at distributing malicious content or phishing. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/strik?keyword=acuerdos+de+paz+en+la+habana+2015+pdf
    • http://doxukari.zoomsauces.com/uploads/1/3/2/8/132814977/luvufoxobuzu.pdf
    • http://firaz.divineoracle.org/uploads/1/3/2/6/132681192/4acac4f8ec82.pdf
    • http://zaguxin.delphilibrarydigital.com/uploads/1/3/1/4/131437361/pujijozemax.pdf
    • http://files.valerianaq.com/uploads/1/3/0/7/130775484/mumuziridorixakot.pdf
    • http://files.ohmog.org/uploads/1/3/2/6/132681488/todire_vuwot_pelixululijolo_lufojasil.pdf
    • http://sinagasub.communitycreditinc.com/uploads/1/3/1/6/131606490/jepuxisemupenerupu.pdf
    • http://zovopovu.blitzmarketingma.com/uploads/1/3/1/0/131070161/93415.pdf
    • http://files.parvathyprem.com/uploads/1/3/2/6/132683001/273a1b74daf8.pdf
    • http://wisiwepu.planningforgrowthnorthsk.com/uploads/1/3/0/9/130969656/8488902.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0462/2250/8186/files/53554954708.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/apple_airport_express_manual.pdf
    • https://uploads.strikinglycdn.com/files/ac79a7b5-1403-403e-b539-73e93b4542aa/78853390331.pdf
    • https://uploads.strikinglycdn.com/files/db26eaa1-f926-4799-99fd-8afe9cc4c68e/xiruzobo.pdf
    • https://uploads.strikinglycdn.com/files/c63d2e3c-3c93-444f-9ea6-de875bd5e2e5/90633977993.pdf
    • https://uploads.strikinglycdn.com/files/d853da8d-cce7-49bb-8082-989520fec523/wilifukigekoperowa.pdf
    • https://uploads.strikinglycdn.com/files/df4bfe50-90c2-4def-b9cb-730472421477/78773212264.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/
    • https://uploads.strikinglycdn.com/files/c63d2

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006721.bin
ead21bfb3be17e722d4bee21a44a0fe62f9b82ef4a929ce67ee426fceb0cbeab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6721 5628 bytes
font_01_sfnt_off00007a3b.bin
70e237f7ec36ee379f1b6aa7e78bf0ef2265a823199e5de4eb8a1c22bbf110c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3B 10540 bytes
font_02_sfnt_off00009ca5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA5 4324 bytes

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