Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a70092fd4400628…

MALICIOUS

PDF

50.4 KB Created: 2020-08-31 02:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e98005657e5a6b10423073f0b9624a06 SHA-1: 128faf5e9afea7e4035fb8d300458239f9bfa812 SHA-256: 7a70092fd4400628ccdb482785577e7d4ee97c9834f820418ac79d699b123905
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=las+apariencias+enga%25C3%25B1an+pelicula+online'. This URL is presented within the document body, suggesting a phishing or malware distribution lure. The presence of a large number of external PDF links also indicates a link farm, often used to obscure malicious activity. No scripts were extracted, but the ML classifier strongly flagged this PDF as malicious.

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=las+apariencias+enga%25C3%25B1an+pelicula+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/93946595769.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/28921891094.pdf
    • https://cdn.shopify.com/s/files/1/0437/1451/1001/files/42740629303.pdf
    • https://static.usrfiles.com/ugd/b8c837_caaba8d62c9f49278d45ca32e7757fe3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d480769a35384017974c1bb12043c8d9.pdf
    • https://static.usrfiles.com/ugd/0bcf16_ed8f2316dfa641ee84851401f7878cd5.pdf
    • https://static.usrfiles.com/ugd/b8c837_608b274125884702a3938e1ac8db3600.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/93074706307.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/70008032012.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/panamax_m5400_pm.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5070/files/minecraft_pc_versi_1._12_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/god_of_war_betrayal.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/megukugotivadowodomunojas.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/android_os_versions_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/rodemurek.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_off0000847e.bin
7d26504708aa6d22f3e335370897edfab485e527f59acf82dd804265444f444c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847E 5256 bytes
font_01_sfnt_off00009630.bin
38c93062dbb8243d1b5f47e26d8927d2c014be2f82226436743e229a9ffe69a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9630 11060 bytes

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