Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0a93093bad8b32…

MALICIOUS

PDF

38.3 KB Created: 2020-08-14 22:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27bea2b2969eebd44776ebf5b8a08e89 SHA-1: c5af84c6366eb43af685e23ea6cf7f2b6d103490 SHA-256: 1c0a93093bad8b3244cf89809109f4c10a7cc2440ef67ea06819d89d17149f60
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, suggesting SEO manipulation to attract victims. The document body, though corrupted, contains the target URL and references to 'Solidworks cam tutorial pdf', indicating a lure. The ML classifier strongly supports the malicious nature of this PDF.

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=solidworks+cam+tutorial+pdf
    • http://tulek.ipadbootcampforstudents.com/uploads/1/3/1/3/131383483/wafazale.pdf
    • http://files.eulaandelbridge.com/uploads/1/3/0/7/130740522/bbe3462c00aa.pdf
    • http://files.oldhamtinkers.com/uploads/1/3/1/3/131379246/9626807.pdf
    • http://files.lindabanfalvi.net/uploads/1/3/1/4/131407227/4927163.pdf
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/the_axiomatic_method_in_biology.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/botany_practical_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/moment_js_format_am_pm.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/33238264978.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/73940691920.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/roxekonowe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/agnes_martin_lugand.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/xisutirefib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/navneet_dictionary_english_to_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/beviwagasupinujujopipegeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/67343072871.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005602.bin
6d682d812fe70301a8c5db228866eeb0472f81f23ea835fd52fbf360ae65fff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5602 5560 bytes
font_01_sfnt_off000068e5.bin
dec2a12d00b85ce4ba3eaf3eabb8037980502eeee40de3fbb4f74087688778b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E5 10588 bytes