PDF malware analysis — malicious · ce81021c2137cd6a

MALICIOUS

PDF

72.0 KB Created: 2020-08-07 08:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a43d0faa106289e72090d06e9e897e23 SHA-1: c5bacef09a75cb7c2eacb80d92e024c030ab5b16 SHA-256: ce81021c2137cd6aecd64d24aa993d52c0189904f422b20a5126e2a0bd001c79

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=bhaskara+1+biography+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve search engine ranking for malicious content.

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=bhaskara+1+biography+pdf
- http://funemofib.dankoairguns.com/uploads/1/3/0/9/130968921/wanoja.pdf
- http://files.hmongunited.org/uploads/1/3/1/3/131380005/ecf026c75.pdf
- http://files.anthamation.com/uploads/1/3/0/7/130776200/6260965.pdf
- https://cdn.shopify.com/s/files/1/0433/9518/6851/files/92922655535.pdf
- https://cdn.shopify.com/s/files/1/0431/5784/8224/files/941_angel_number.pdf
- https://cdn.shopify.com/s/files/1/0432/3393/5515/files/lejem.pdf
- https://cdn.shopify.com/s/files/1/0431/8252/2528/files/return_to_blockland.pdf
- https://cdn.shopify.com/s/files/1/0429/7257/7946/files/algebra_practice_test_with_answers.pdf
- https://cdn.shopify.com/s/files/1/0431/2501/4684/files/25489971958.pdf
- https://cdn.shopify.com/s/files/1/0432/2754/5757/files/zagajuroviw.pdf
- https://cdn.shopify.com/s/files/1/0434/5207/2088/files/43095252815.pdf
- https://cdn.shopify.com/s/files/1/0434/2733/2245/files/54639645821.pdf
- https://cdn.shopify.com/s/files/1/0429/8620/9439/files/xomagusewej.pdf
- https://cdn.shopify.com/s/files/1/0434/0691/7799/files/68292955221.pdf
- https://cdn.shopify.com/s/files/1/0433/9266/3702/files/kiwevovo.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000a771.bin` `51311e9bc5fef7bfbf21019695e1c4d02c9d485b555c838349da254eca80716b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA771	5680 bytes
`font_01_sfnt_off0000baca.bin` `44971ce04f3d98717dcecb2c167d852ed4dec76d646454f0ebe8422407e21584`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBACA	6460 bytes
`font_02_sfnt_off0000ced4.bin` `fdc26627fbf011f9bef789f5ef1b0157fc1f26be78e22054f0e52629eb898b1c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCED4	14496 bytes
`font_03_sfnt_off0000fc3e.bin` `52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC3E	16036 bytes

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