PDF malware analysis — malicious · a132d5506b721ddc

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 15:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9f8fd97a3bbeff96a5d72b07c48ee078 SHA-1: 676d992f2dae94fc64cf9e3dc1e68ddd53ed909b SHA-256: a132d5506b721ddcc25cf947cc6cc0a9b10625c5cfdb875444d90c5f688238b3

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's primary purpose is to redirect users to malicious sites. The presence of a large number of external PDF links, as noted by PDF_SEO_LINK_FARM, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=black+s+legal+dictionary+pdf
- http://files.opulashbeauty.com/uploads/1/3/1/3/131380128/1047134.pdf
- http://files.ellendonaldson.com/uploads/1/3/1/8/131856146/tetoj.pdf
- http://files.magistrasolomon.org/uploads/1/3/1/3/131380625/f4b81c3e4.pdf
- https://cdn.shopify.com/s/files/1/0438/4836/8288/files/peter_drucker_managing_oneself_free_download.pdf
- https://cdn.shopify.com/s/files/1/0428/6509/8908/files/sadebuvisumikuxaxugij.pdf
- https://cdn.shopify.com/s/files/1/0427/5588/3175/files/36977256163.pdf
- https://cdn.shopify.com/s/files/1/0432/7656/6684/files/40154220430.pdf
- https://cdn.shopify.com/s/files/1/0431/7026/7300/files/27591947279.pdf
- https://cdn.shopify.com/s/files/1/0431/6620/4066/files/83780416039.pdf
- https://cdn.shopify.com/s/files/1/0434/9696/4261/files/zetapexafesijuxikowof.pdf
- https://cdn.shopify.com/s/files/1/0435/5820/7651/files/avocado_nutrition.pdf
- https://cdn.shopify.com/s/files/1/0437/6743/1329/files/largest_city_in_alabama.pdf
- https://cdn.shopify.com/s/files/1/0428/7568/2972/files/bosch_maxx_4_manual.pdf
- https://cdn.shopify.com/s/files/1/0433/6618/7176/files/2000_toyota_tacoma_repair_manual.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_off0000655f.bin` `657f500613042ca4cd00da0617826f085684e29f9bdea63240ae074d2edfa08e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x655F	5324 bytes
`font_01_sfnt_off0000778a.bin` `672952d334874e775e0d8513df90784c96cbe597aae733f339ed96bb5232d7eb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x778A	10896 bytes
`font_02_sfnt_off00009c01.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C01	4324 bytes

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