Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe849b6a4c8ec3f…

MALICIOUS

PDF

50.3 KB Created: 2020-08-31 14:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fd3d0deeed1d23fb45a0042f50579d3 SHA-1: 6650c20ed14fb3820a808744844cf4ef419849f7 SHA-256: bbe849b6a4c8ec3fb1a6e6c63b4068f6a3fe3788e921f4e4f9eec5a347fd3711
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or distribution of further malicious content. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.com, which is known for redirecting to malicious infrastructure. While the document body is heavily obfuscated, it contains the malicious URL, reinforcing the findings.

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=floating+action+bar+android+example
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/liroferaxebosamomamix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/12177331225.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/broken_but_beautiful_video_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/typhoid_fever_review.pdf
    • https://static.usrfiles.com/ugd/3b0c81_af77d6e332f9457fa3a8b88ff76f92b9.pdf
    • https://static.usrfiles.com/ugd/1cfe37_a725f413da6f4ed9b690ed3d063d5e9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fbb5fc6edde4f4c92e68ec0a241a47e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f8db4302e5f4fa99060525ba0e440dd.pdf
    • https://static.usrfiles.com/ugd/917232_0f9dca6a9d094f968fc842c4d077ec50.pdf
    • https://static.usrfiles.com/ugd/5ecadc_1ba37f7618574899b807269722b2fdd2.pdf
    • https://static.usrfiles.com/ugd/0a052f_f49de13102424e3e99c8344316f9f3b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_45d168df0d544de6a846328f3b998d86.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_988f4e62a2484af18a1761af35a70b4c.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/
    • https://static.usrfiles.com/ugd/1cfe37_a

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007eba.bin
ff7b2ac1fbcb5fff5b947a555e787a7dfc4056cf73f09cf459946a4688d40768
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBA 5380 bytes
font_01_sfnt_off000090ed.bin
1273abf25311220721f42f92285fd03407b44b878a25aeea61cff4bbaad0be77
pdf-font-stream PDF embedded font (sfnt) at offset 0x90ED 13408 bytes