Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb15ab2da29a5a60…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 02:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 095a0b4164d1474838be2856af6c7174 SHA-1: 925696e73aa493526f8d5037ea218b81b9e22d50 SHA-256: bb15ab2da29a5a605b4491330646ac3a3ec844c3907878189d1ad4f2ad60496e
152 Risk Score

Malware Insights

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

The PDF file contains a prominent link to 'ttraff.cc' which is flagged as a malicious redirector. The document body text, though heavily obfuscated, includes the same URL and keywords related to downloading 'the sims freeplay unlimited everything apk', suggesting a lure for users to download potentially unwanted or malicious software. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm strategy to distribute content.

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=the+sims+freeplay+unlimited+everything+apk+download
    • https://cdn.shopify.com/s/files/1/0454/7251/4206/files/bomelijavisozezunagil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/advantages_of_5g_technology.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7051/files/kogutejuwopilevipeger.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/fonujoxozunavipaluxez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/boxijexido.pdf
    • https://static.usrfiles.com/ugd/3bca44_e351493c95bc4b839a46415de230efb7.pdf
    • https://static.usrfiles.com/ugd/57c819_5b4dc02282714e5094d801fafdec283b.pdf
    • https://static.usrfiles.com/ugd/0779a3_9977586ad6e64cd09fb6df68fd859b9c.pdf
    • https://static.usrfiles.com/ugd/6cf392_c52e1d475d5849308cf609849abac2d1.pdf
    • https://static.usrfiles.com/ugd/8cbfce_03d02ae47eac480998702a856db38016.pdf
    • https://static.usrfiles.com/ugd/784815_399ca08c18b24fa4906781282cfbe980.pdf
    • https://static.usrfiles.com/ugd/b8c837_72d4d373bbd24959b2e36528554b99ea.pdf
    • https://cdn.shopify.com/s/files/1/0463/2798/8385/files/45887940919.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/zamegadofinug.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_off00006684.bin
6f52d5cb89ccab9322ebcf3ddf7a737c9a15b8ca19f35a858b39675704933531
pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 5724 bytes
font_01_sfnt_off000079ef.bin
b47af929740a2d9ef41bba6b6841a95e0ae0fa2d9660bbec4930a9938a35efbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x79EF 10272 bytes