Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f1e05986e1a61f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 21:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a8bf043795038bae7373ed640cacf3a SHA-1: a0fc78e57f56c399db0b0b277bac844275b40403 SHA-256: 14f1e05986e1a61fb3c5cec6607adf09f5ced889c41837edd4214a39af125fc4
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'. This link is presented within the document body, disguised as an 'Android developer resume objective'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

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/wix?keyword=android+developer+resume+objective
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6239/2992/files/bcmon_latest_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3245/3015/files/14260835740.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7778/files/54436411741.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/tifutuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/addressing_modes_of_arm_processor.pdf
    • https://cdn.shopify.com/s/files/1/0440/0565/4678/files/battleground_games_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/maxodonotafezo.pdf
    • https://static.usrfiles.com/ugd/12f4eb_821c255d38ca431caf9f633a2ea757d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cc12c43e58c4190a9016b0b856f756d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b458b3bc71f041ed8de160528ca3fe6f.pdf
    • https://static.usrfiles.com/ugd/238140_5d03fe50563a4448b8c2a3c928318f4e.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/conclusion_de_enlaces_quimicos.pdf
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/movies_coastal_grand_mall.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/wanilegebojasamonopebe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0457/5651/4460/files/genetic_variation_in_humans.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_off00006979.bin
fdaaa3b4783273db750b142c9f8dd1a8591fb0bb3a5898c4055db2ecb242f545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 5276 bytes
font_01_sfnt_off00007b50.bin
0a10aa32f290ba5bacc25694b0535e52b77b42aba0d0278cdc321ca404d2b26e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 11408 bytes

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