Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92c8677b7bbac03…

MALICIOUS

PDF

34.4 KB Created: 2020-08-29 07:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e466f519de81c4fad50f53b8e77fa5d SHA-1: 9b361c82b333c960d729506106de84c93e017334 SHA-256: a92c8677b7bbac03fe479ebded522b610905f2e108a61df9e8dcb42828ffbc36
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=electronica+basica+facil+ernesto+rodriguez+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, further supporting the malicious intent.

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.com/wix?keyword=electronica+basica+facil+ernesto+rodriguez+pdf
    • https://static.usrfiles.com/ugd/b8c837_547140e4e8ae4b859316a8ed1dda1282.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a92d4228df245729137bddd11933ccb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2ec2532ab9414db6307d41b171cbf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6d5c376767f4cbdaf1b5c0ac0765ec8.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/93543739578.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/28869292941.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/adiponectin_and_obesity.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/lubuxadezezubuxugakozivi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2140/0226/files/bomomir.pdf
    • https://cdn.shopify.com/s/files/1/0457/0824/7196/files/2318463225.pdf
    • https://cdn.shopify.com/s/files/1/0467/7877/7753/files/happy_new_year_golden_girls.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.

FilenameKindSourceSize
font_00_sfnt_off00004676.bin
6b0a6d29c1866772f8cf67cb75b8f4309dc7d83b8831b0c84c754725b1131584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4676 5468 bytes
font_01_sfnt_off00005919.bin
9c26c9c2d0c45ac0741aaa90d951872f1a65bf7797113b7489f4897a88ab2220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5919 10656 bytes

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