PDF malware analysis — malicious · 5270210bc2527f85

MALICIOUS

PDF

45.7 KB Created: 2020-08-22 02:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c70a88a4f7cd8abca8fb9a504347f082 SHA-1: 0ae4cdf6c4bffb7a489d381e5a005a88acdc7854 SHA-256: 5270210bc2527f85ae9604b5fbf4e3c4a06dbed7a19f45c5955534d2c433849f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary link directs to 'ttraff.com', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=genotype+phenotype+worksheet+middle+school
- http://files.laspinashouses.com/uploads/1/3/0/8/130814605/92f7d97.pdf
- http://ludavo.twincityphotography.com/uploads/1/3/0/8/130814328/2783753e704d5.pdf
- https://cdn.shopify.com/s/files/1/0428/3233/0908/files/mogufa.pdf
- https://cdn.shopify.com/s/files/1/0429/8234/2815/files/bella_bestia.pdf
- https://cdn.shopify.com/s/files/1/0428/8544/7833/files/wozenajaderol.pdf
- https://cdn.shopify.com/s/files/1/0431/1737/9745/files/sajewasog.pdf
- https://cdn.shopify.com/s/files/1/0430/9748/9572/files/97765586400.pdf
- https://cdn.shopify.com/s/files/1/0434/8664/2338/files/horse_drawn_carriage_crossword_answer.pdf
- https://cdn.shopify.com/s/files/1/0431/0496/0676/files/83440459303.pdf
- https://cdn.shopify.com/s/files/1/0449/6372/5480/files/candis_cayne_as_brendan_mcdaniels.pdf
- https://cdn.shopify.com/s/files/1/0435/3549/9418/files/60804247542.pdf
- https://cdn.shopify.com/s/files/1/0438/4971/1781/files/black_australorp_chickens.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_off0000737d.bin` `fce55e592e9ce97293264dabfab5eaa3256830bfdc2259a7e34f19f5a322e37f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x737D	5392 bytes
`font_01_sfnt_off000085c5.bin` `6e06c9be5c6575bd1429486e2ef23f2476b411b7414cc78bb447f547d3b20b38`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85C5	10592 bytes

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