Malicious PDF — malware analysis report

Static analysis result for SHA-256 195e7d8dcb30d1f2…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 20:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdabe5cf4d33a5d4c28978f60aa99ffa SHA-1: d7a703832a48983d5915ba41d3882aab20ad567e SHA-256: 195e7d8dcb30d1f24886eef0c37b4292f4886f3825c8a108042c713a9c7cf35b
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that are identified as malicious redirectors, specifically pointing to 'https://ttraff.cc/wix?keyword=australian+visa+application+form+1401'. The document's content, though heavily obfuscated, appears to mimic an Australian visa application form, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm used to distribute malicious content or improve SEO for malicious sites.

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=australian+visa+application+form+1401
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/29394597491.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/home_rental_agreement_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/66444980150.pdf
    • https://static.usrfiles.com/ugd/d01287_cdbeacce69354e7a99ae100a557c21d3.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_78d7b33b045d4d66ad7454a805222937.pdf
    • https://static.usrfiles.com/ugd/5de1df_4ff720532a75424aad9c00e6e5430901.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b3bd44c3eb94a4f8ee3af58f267030a.pdf
    • https://static.usrfiles.com/ugd/7598fa_e0c50044b54a4b9f80b697c534960383.pdf
    • https://static.usrfiles.com/ugd/96768c_e6f23304faa64e0cbefc3c8e307b56df.pdf
    • https://static.usrfiles.com/ugd/ce14f3_f3617b5e3dab4969aa6f6d1ea513515a.pdf
    • https://static.usrfiles.com/ugd/0a052f_728bf353ab88448cb6351c85a71ce750.pdf
    • https://static.usrfiles.com/ugd/c7a620_2ab9c6dfd8cc48df87a993352aea4ff6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63ed30d3bb74fc4b721a7fc51224914.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_off00006417.bin
f901c528156c57917f133e0c0b853db7be262f323bceb7bedc88d6cd062df50d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6417 5492 bytes
font_01_sfnt_off000076c1.bin
8917020bdb384d7ecd95ebaedc1cf36e25a6f4326d1b00da3f0d0fa6dbf776d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C1 9840 bytes