PDF malware analysis — malicious · abe12f2f04230659

MALICIOUS

PDF

55.9 KB Created: 2020-09-01 09:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c41bfe2e3d828338d4f635c26fb13e13 SHA-1: 6336ff66f1bd4204b8b21695ebbd17b1aedd392b SHA-256: abe12f2f042306595ff8d02b76cb15174c72c5ee1fc4058f29d8d165786321b8

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=yellowhammer+report+government+website'. This URL is embedded within the document body, which also contains garbled text alongside what appears to be a reference to a 'Yellowhammer report government website', suggesting a lure. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm strategy, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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.me/wix?keyword=yellowhammer+report+government+website
- https://cdn.shopify.com/s/files/1/0429/9417/2058/files/nelidanuduboziri.pdf
- https://cdn.shopify.com/s/files/1/0466/3479/5173/files/44189979083.pdf
- https://cdn.shopify.com/s/files/1/0432/1135/8372/files/blank_taxi_receipt.pdf
- https://cdn.shopify.com/s/files/1/0438/3725/9938/files/sijew.pdf
- https://cdn.shopify.com/s/files/1/0437/0163/3177/files/wijisepalevu.pdf
- https://cdn.shopify.com/s/files/1/0434/7196/2269/files/70006756979.pdf
- https://cdn.shopify.com/s/files/1/0435/9369/5391/files/english_grammar_exercises_for_class_4.pdf
- https://cdn.shopify.com/s/files/1/0429/3564/8409/files/97904638694.pdf
- https://static.usrfiles.com/ugd/9c43ec_360663e020e94b66a7e80b640a91185d.pdf
- https://static.usrfiles.com/ugd/b8c837_729d691f03ea498285c983a66500103a.pdf
- https://cdn.shopify.com/s/files/1/0429/6297/6921/files/56522672231.pdf
- https://cdn.shopify.com/s/files/1/0435/3271/4139/files/muretefarobazipowe.pdf
- https://cdn.shopify.com/s/files/1/0463/2752/9633/files/akkurat_font_ttf.pdf
- https://cdn.shopify.com/s/files/1/0429/8981/3909/files/ruwose.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00008f0e.bin` `2868a165d68f4cc8ae54f5b0e4fbf9d12e977d0e73a5aa2417d2e116baea3822`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F0E	5272 bytes
`font_01_sfnt_off0000a0e9.bin` `6684659c6ef547c54ba008d33cdb79151a31dab534e05f937dd2a13fc9b4f406`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0E9	10364 bytes
`font_02_sfnt_off0000c452.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC452	4324 bytes

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