PDF malware analysis — malicious · 0e92fea42f988489

MALICIOUS

PDF

43.3 KB Created: 2020-09-05 15:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ab0216c51cc096f9bcedc771de190896 SHA-1: c20a1aabe2cf3b6ee13fdcefa8384fd366017abb SHA-256: 0e92fea42f988489c208a035f85dd491aabb1687588979fd42b60e41d14a8310

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests an attempt to lure users to malicious content, potentially for phishing or malware distribution.

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.club/pify?keyword=shanks+and+bigfoot+sweet+like+chocolate
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_31abda09386c4690a9519d8b20c6ffb2.pdf
- https://static.usrfiles.com/ugd/b8c837_1ce5c42005af4c70bb00e2326beefddc.pdf
- https://static.usrfiles.com/ugd/4c76bf_d0cf5ff7b5954e3dbb889d1a92fa2233.pdf
- https://cdn.shopify.com/s/files/1/0437/9095/8749/files/jizoruwonoten.pdf
- https://cdn.shopify.com/s/files/1/0428/1778/1927/files/lipepapetitolidegep.pdf
- https://cdn.shopify.com/s/files/1/0431/3815/4650/files/algebra_problems_with_solutions_and_answers.pdf
- https://static.usrfiles.com/ugd/33ab24_f584874cde434cb090e7ef7c04901ea7.pdf
- https://static.usrfiles.com/ugd/05301a_7bfd107905b24d54b5d7db093377e602.pdf
- https://static.usrfiles.com/ugd/b96e41_e0cce7d49a6d4901baa80dcb68a859e9.pdf
- https://static.usrfiles.com/ugd/b4f0c6_b547a473fcd245ff8e64fc9afb9ef3f3.pdf
- https://static.usrfiles.com/ugd/314c35_bf811d15c0ef4ce6ae2889b505e208bf.pdf
- https://static.usrfiles.com/ugd/73cb9e_3f3ab5049f2d44d7ac7b7b12dfddc64a.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006a35.bin` `c7c113a46ec7540516c33bab959dbdfd80677144e7627e271a0cd18395e3c190`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A35	5584 bytes
`font_01_sfnt_off00007d4b.bin` `96b3d31b4dc822538716f060daa5441ffad556a027b71adb1791f4ba41210536`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D4B	10324 bytes

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