Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a728183732dbec…

MALICIOUS

PDF

45.5 KB Created: 2020-09-03 23:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7560859bc45fcd34021f722fec8e2968 SHA-1: d73edf5368f453510fc78671005b875f3277fe76 SHA-256: 07a728183732dbecaed439c4cb875c8b18a23bfad7676bd7b07235fb8ec6c48b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to 'ttraff.me', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and text related to Android emulators, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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=android+emulator+paling+ringan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f4f1e1e5ff5b47909987506a0e287bf6.pdf
    • https://static.usrfiles.com/ugd/33c377_a0e1949d97a54149aa238ae60fd33615.pdf
    • https://static.usrfiles.com/ugd/29c71c_552e53013fc74c1faca180149257242e.pdf
    • https://static.usrfiles.com/ugd/81ef4b_ff75aa7d57b0424fae5ce01566e9b377.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3f6b4ee8161407194d91592018acd25.pdf
    • https://static.usrfiles.com/ugd/e2b09b_c670b89192864d7fb0bd8561f8f9924e.pdf
    • https://static.usrfiles.com/ugd/97aff7_b769fb0272654d6c981c81f3995aecd9.pdf
    • https://static.usrfiles.com/ugd/1df9ea_57760e20be1e447e8e4357dfc9e51689.pdf
    • https://static.usrfiles.com/ugd/3fb742_f3477e176e47429b9723f6324ba5f3e2.pdf
    • https://static.usrfiles.com/ugd/44b221_447df7b8c4b448f78b5280d74fc012f1.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/ririverozomunopebo.pdf
    • https://cdn.shopify.com/s/files/1/0464/2445/7368/files/circular_motion_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/92288916778.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/suwid.pdf
    • https://cdn.shopify.com/s/files/1/0460/3831/9268/files/tedaleferuzebamiradazezab.pdf
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/23675959804.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/44696036251.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/zowemelusekibonurizuxigul.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.

FilenameKindSourceSize
font_00_sfnt_off000074b0.bin
03fd6bafd58b3057433d4a046c64e6e8a3812f87a9577646f82df44da4003ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B0 5088 bytes
font_01_sfnt_off000085e5.bin
9c4b343f1081718279498acb426966cbd2d6ac8650da6f7cba3ca131cf41415a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E5 10348 bytes

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