Malicious PDF — malware analysis report

Static analysis result for SHA-256 3040aeca65b2df1a…

MALICIOUS

PDF

39.3 KB Created: 2020-08-30 11:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7401925c959682ef3ece9f261586913 SHA-1: 4cb5bd64aa75781414e99507464af3568a2e2b13 SHA-256: 3040aeca65b2df1aa19adafdc12653f927002dc97c8aa470794f8a0a2330892d
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/wix?keyword=robert+greene+ba%25C5%259Ftan+%25C3%25A7%25C4%25B1karma+sanat%25C4%25B1', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains what appears to be junk data, further supporting a malicious intent.

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.cc/wix?keyword=robert+greene+ba%25C5%259Ftan+%25C3%25A7%25C4%25B1karma+sanat%25C4%25B1
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/nowunipesad.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/lewewumufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/28476321253.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3944/files/zojirushi_bb-pac20ba_bb-pac20_home_b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3430b57eb72440158e15e13c15b71568.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1befd1435fb456193bef9b441353e4c.pdf
    • https://static.usrfiles.com/ugd/33a16d_6ad8e95a7a1b4f3ba1a25f149e77731d.pdf
    • https://cdn.shopify.com/s/files/1/0430/2874/2298/files/mawezimazus.pdf
    • https://cdn.shopify.com/s/files/1/0463/2828/3291/files/motorcycle_helmet_size_guide_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/mefizinugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/17260762580.pdf
    • https://static.usrfiles.com/ugd/b8c837_94259fb863dc4072ba3523eb683f095f.pdf
    • https://static.usrfiles.com/ugd/3f4b99_5d9f409449d547b3870f1caa79ae2f97.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://cdn.shopify.com/s/files/1/0430/2874/2298/files/mawezima

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057ce.bin
40719d57576a81bd84757d8f8d41d30cd7038f093d695259b1ad5dbb75f68e7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x57CE 5648 bytes
font_01_sfnt_off00006a47.bin
61e6b042ccb295a43c6dd93beee4b5a86c58911bf75934421818a54853374274
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 11448 bytes