Malicious PDF — malware analysis report

Static analysis result for SHA-256 198311647e33278e…

MALICIOUS

PDF

47.7 KB Created: 2020-08-26 12:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4694b5d51fcdefb13eb24dc839351444 SHA-1: c7cb94b4720c37f90bc114916f0735142c8236a8 SHA-256: 198311647e33278eb6ed4711b4f589d6549303aa661dea07dde2ffa7f132e04d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is further supported by the document body containing the same URL and a lure related to 'Android 8.1.0 root no pc'. The PDF also exhibits a link farm behavior, with numerous links to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly indicate a phishing or malware distribution attempt.

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.com/pify?keyword=android+8.+1.+0+root+no+pc
    • http://files.clinmicrolab.org/uploads/1/3/0/7/130739654/lipifazox-bedifibok-wiketasak.pdf
    • http://files.manaopublishing.com/uploads/1/3/2/7/132712005/dexata-luxevamevevavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0448/0122/8951/files/vigimanub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/widerob.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1688/files/zotovilejolusidutanadoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/86184412205.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/berkshire_encyclopedia_of_world_history_vol_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/49382957912.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/2116998854.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/impact_of_human_activities_on_environment_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/sekuzawiberavonuzizotuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3883/files/suwofokuwilavotaxaxizode.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/38745627690.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/52355541670.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/tozepuxurixezawi.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_off00006f9f.bin
e3d9e6c4eff2af9f6ca4150bc97e7295592d0b73df6b71ee0658a3eef19ad6af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9F 4724 bytes
font_01_sfnt_off00007fb3.bin
2036702b6c18cbbb36852a7565d6eb95ae102c1d304975f0fd32c138c152925e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB3 10364 bytes
font_02_sfnt_off0000a338.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA338 4324 bytes

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