PDF malware analysis — malicious · b87bc0da807e7117

MALICIOUS

PDF

49.8 KB Created: 2020-08-08 19:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b3857c941e16f823792a37990ae92653 SHA-1: ce61147a098025b6e6e03fbdefb19f4a123ed447 SHA-256: b87bc0da807e7117be5df1d46ca3ed7a60f50b894fe72202ff2e8299c0be4595

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a prominent link pointing to `https://ttraff.com/pify?keyword=ajahn+brahm+books+pdf`. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to book downloads, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm heuristic.

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.com/pify?keyword=ajahn+brahm+books+pdf
- http://files.childrenandthechurchpublishing.com/uploads/1/3/0/8/130814669/foluka-fulovodibu-zamemenojesag-misuzupasod.pdf
- http://files.devitawellnessnow.com/uploads/1/3/0/7/130740357/5241551.pdf
- http://files.racheleveholmes.com/uploads/1/3/1/8/131856664/wipunizibozikof-buderopegelo.pdf
- https://cdn.shopify.com/s/files/1/0433/2853/6731/files/vokize.pdf
- https://cdn.shopify.com/s/files/1/0433/9095/9766/files/merger_and_acquisition_examples.pdf
- https://cdn.shopify.com/s/files/1/0431/9890/6528/files/tuwebenibavaraz.pdf
- https://cdn.shopify.com/s/files/1/0439/2953/4632/files/75504443584.pdf
- https://cdn.shopify.com/s/files/1/0450/6189/8390/files/tom_apostol_calculus_vol_1_download.pdf
- https://cdn.shopify.com/s/files/1/0431/3815/4650/files/73456213066.pdf
- https://cdn.shopify.com/s/files/1/0427/4647/8759/files/sewezuzovubugapudasigune.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
- https://cdn.shopify.com/s/files/1/0431/4988/5606/files/butajebalimekofamowuzineg.pdf
- https://cdn.shopify.com/s/files/1/0430/6678/5949/files/zevukagosozufidodoj.pdf
- https://cdn.shopify.com/s/files/1/0430/3811/3955/files/95699007250.pdf
- https://cdn.shopify.com/s/files/1/0430/6314/8706/files/11036720893.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000083f0.bin` `b15fb6501621bbce76fe9033c48f8fe8b1b31ab98bb5247fefdb75d168bce886`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83F0	5516 bytes
`font_01_sfnt_off00009684.bin` `0bbe7733778027d15c755727c06621166e9698cd848fc3e0d0891b2ec6be3bba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9684	10656 bytes

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