Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afbd68eb9ccb3eb…

MALICIOUS

PDF

113.0 KB Created: 2020-07-27 08:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b63e9b049e9a02663d3004ec9ae33368 SHA-1: 2003ac21db3e7ad0d8f1c728980d0c9455ce39d3 SHA-256: 9afbd68eb9ccb3eb5c9d81e23d0c965d420faaae3cc21cb476929562aea415a6
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to lure users with a fake download offer. The document body, though heavily obfuscated, contains keywords related to the lure. The PDF also hosts a large number of links, many pointing to Shopify, likely as part of a link farm to improve SEO for the malicious redirector.

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.ru/pify?keyword=alien+swarm+pc+free
    • http://files.rsweddingaffair.com/uploads/1/3/2/3/132302916/d29718.pdf
    • http://files.eclecticcontent.com/uploads/1/3/0/7/130775558/dejurazob-bujonelub.pdf
    • http://files.westmorelandhillsgc.org/uploads/1/3/2/6/132695405/3a99a7.pdf
    • http://files.appletreecontractors.com/uploads/1/3/1/6/131607712/9709263.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/90819980811.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/35320993499.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/11618264051.pdf
    • https://cdn.shopify.com/s/files/1/0436/4818/8569/files/xerutipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/50946222697.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/40609431634.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/2429470327.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/92180700187.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5745/files/75723042857.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatajimawi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/lijefiketupajeta.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_off00016cd8.bin
8d7a787fee2e1f2132029194e425360b2a43ca3af33ee55d012d637b7adb52a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD8 4840 bytes
font_01_sfnt_off00017d2c.bin
2e9e48a025def5e7b4f3fb0db869f33e32538cd7f50707f15814aa335d6b6546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D2C 10556 bytes
font_02_sfnt_off0001a141.bin
273ad5591ab136e11e4a8bd0aea8936add0284d61d420d5da58f855bb9eb462b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A141 16112 bytes

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