Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1033b373b06dd34…

MALICIOUS

PDF

108.1 KB Created: 2020-08-18 21:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a5189dc12468ccf57158e45f19785d4 SHA-1: 949a11d381beb9e9bfeee362d0ebe915a17b6799 SHA-256: e1033b373b06dd34de8e626f1f3e7ae3634c0bf3ff8028eb2e9278eb35a9ee33
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, limiting the analysis of further stages.

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.ru/pify?keyword=adaptavist+forms+for+confluence
    • http://xaweteba.haortizlaw.com/uploads/1/3/1/6/131606490/6601181.pdf
    • http://files.felixschuster.org/uploads/1/3/2/6/132681865/9962f7fc0685a1a.pdf
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/13884287225.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/dokezusilig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/carta_de_apresentao_de_empresa_para_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/ryobi_4_cycle_blower.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/81524337946.pdf
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/korakedofizepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8724/1119/files/64854772905.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/46320762154.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5766/files/72028414463.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/zomugasunajegiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/white_wolf_magazine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014571.bin
1f659d6e5158ff68656627ef35c86f5c6066ef8d3e4bd873c61130697d03d69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14571 5352 bytes
font_01_sfnt_off00015790.bin
b5ea29c2f71feb7f53940990110276576c7f43d144327fee124ba0fd95f9ba1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15790 17360 bytes
font_02_sfnt_off00018d85.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D85 16204 bytes

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