PDF malware analysis — malicious · 984f71e3fcb9155a

MALICIOUS

PDF

58.4 KB Created: 2020-08-11 14:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b217dbf45ddbe48b99a6fd0018eb5af0 SHA-1: 3123ad427c188f4d7668d6e4747750baf5272136 SHA-256: 984f71e3fcb9155a83c3be6a0264434fcf216967a2e6ee52533f20fc71dc3383

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document's body, disguised as a research methodology PDF. The presence of numerous other external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=libro%20sampieri%20metodologia%20de%20la%20investigacion%20pdf
- http://files.offthehookmarinefish.com/uploads/1/3/0/7/130740573/8f720c81e7b.pdf
- http://files.vagabonder.org/uploads/1/3/1/1/131164569/datowukepaxa.pdf
- http://files.anatomy-demystified.com/uploads/1/3/2/6/132696414/witeperagu.pdf
- http://kuvujode.christinemcahill.com/uploads/1/3/2/6/132696030/zelalefiwu.pdf
- http://rimupuk.feralaffairs.org/uploads/1/3/0/7/130738731/20c9801.pdf
- https://cdn.shopify.com/s/files/1/0440/5726/4280/files/50027105239.pdf
- https://cdn.shopify.com/s/files/1/0429/9613/8137/files/jifimebefadigal.pdf
- https://cdn.shopify.com/s/files/1/0438/1717/3149/files/10418877200.pdf
- https://cdn.shopify.com/s/files/1/0431/6135/4389/files/53227060555.pdf
- https://cdn.shopify.com/s/files/1/0431/8714/2818/files/42113320689.pdf
- https://cdn.shopify.com/s/files/1/0448/7141/8018/files/koguxevazowoj.pdf
- https://cdn.shopify.com/s/files/1/0434/1540/4695/files/72208194022.pdf
- https://cdn.shopify.com/s/files/1/0430/1769/9477/files/80147050212.pdf
- https://cdn.shopify.com/s/files/1/0431/3461/5708/files/zofuz.pdf
- https://cdn.shopify.com/s/files/1/0428/8679/1334/files/ine_ccie_sp_v4_workbook.pdf
- https://cdn.shopify.com/s/files/1/0435/0964/5478/files/vomosutatetujugumavapezid.pdf
- https://cdn.shopify.com/s/files/1/0440/6925/7366/files/tuxumikoro.pdf
- https://cdn.shopify.com/s/files/1/0443/8127/4278/files/cambridge_checkpoint_mathematics_practice_book_7.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_off0000a128.bin` `1ff06eb8b327b29962874d969554db703d95b625efd59eae00fbc78701805251`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA128	5616 bytes
`font_01_sfnt_off0000b429.bin` `3ae65830a0f07b0fb216fac56c0a9d5236405d72f1e61558116a99b3361331e3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB429	11728 bytes

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