Malicious PDF — malware analysis report

Static analysis result for SHA-256 0805992285df9df5…

MALICIOUS

PDF

43.3 KB Created: 2020-08-18 20:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 462502a262d9557fa53a0cebeba0e58d SHA-1: 2ed94b9a15d4ce46e9383f252b97f069ad103811 SHA-256: 0805992285df9df5c9428ad1889341b818891b5aaa7898062082a51126bd4e5c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link redirects to a malicious domain. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to 'Itsfoss guide install linux mint' and the malicious URL, suggesting a lure to a phishing or scam page.

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/pify?keyword=itsfoss+guide+install+linux+mint
    • http://files.bluelabelproducts.net/uploads/1/3/0/8/130813841/32879ff2c68e1.pdf
    • http://kafag.ahrchurch.org/uploads/1/3/0/7/130776818/wizeboxuluge.pdf
    • http://files.mhssportsclub.com/uploads/1/3/2/7/132740285/39b6699.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/23555314069.pdf
    • https://cdn.shopify.com/s/files/1/0437/1536/2984/files/20187836102.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/suzuzowibiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/20260244304.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/xetiterigididufajak.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/13844377262.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/10344612479.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/comment_relier_plusieurs_ensemble.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/45666437883.pdf
    • https://cdn.shopify.com/s/files/1/0435/8986/1535/files/productos_de_la_canasta_basica_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/8256/1176/files/13618207315.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_off0000691e.bin
a1599f29f9f021cb9b90bdfca7af9945c72b393c646e9ed629ac72c4586fe634
pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 5136 bytes
font_01_sfnt_off00007a8c.bin
0811568b4ad8ab44737492140cb0c56e075ac522121d7cab2e343b7e974e7e85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 11080 bytes