Malicious PDF — malware analysis report

Static analysis result for SHA-256 6812b1b926f4504d…

MALICIOUS

PDF

41.9 KB Created: 2020-09-03 08:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 919beab63a710b067358e50ebbdb1eda SHA-1: 12027e1d219374a826d4e7ce2875c098b357ee8c SHA-256: 6812b1b926f4504da977a1c9152732f0b2ca16adf9dabc40c830e407e68d8eb9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure and a link farm of external PDFs. The embedded URL 'https://ttraff.me/wix?keyword=loneliest+girl+piano+sheet' is identified as a malicious redirector. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest an attempt to redirect users to malicious content, potentially as part of a phishing or SEO poisoning campaign.

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.me/wix?keyword=loneliest+girl+piano+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0449/0412/0475/files/street_figher_mugen.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/20420623423.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/58794619431.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/dvt_treatment_guidelines_elderly.pdf
    • https://static.usrfiles.com/ugd/b7ed05_3806bf0771454f47b20ff959ca0885c5.pdf
    • https://static.usrfiles.com/ugd/c1de29_45ad8d9fe7934fbf9c12490766422d0d.pdf
    • https://static.usrfiles.com/ugd/51c472_fa8572485db8408991cee82fa537d4a3.pdf
    • https://static.usrfiles.com/ugd/a01749_019f8e69ab424f0e95b08e4e787c7364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/tulasufafuvadaduborekozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4560/files/40693588070.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/30429979763.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31056735454.pdf
    • https://cdn.shopify.com/s/files/1/0437/3001/0263/files/klein_conduit_bender_guide.pdf
    • https://static.usrfiles.com/ugd/eb6612_2f15bfec48ae4870843fd1742c8ba77e.pdf
    • https://static.usrfiles.com/ugd/af0aa9_30d185190fb743af8178c803b9891dda.pdf
    • https://static.usrfiles.com/ugd/b8c837_8858d9293e914f639ef3c5e852b4a3c4.pdf
    • https://static.usrfiles.com/ugd/e23fbb_19e353aaa351433ab8e730077a6e224b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d18.bin
3f8b6286a40fb30dde2da77e60d893f816b6c8e93709cbc159348c8f167934de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D18 4808 bytes
font_01_sfnt_off00005d5e.bin
ce47f3ec2975b37d8c8cf686e291eae013d7d441e5d77c86ed0771a8d44656ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5E 14496 bytes
font_02_sfnt_off00008a9a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9A 4324 bytes

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