Malicious PDF — malware analysis report

Static analysis result for SHA-256 858e39678ec8821c…

MALICIOUS

PDF

46.9 KB Created: 2020-09-06 08:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d2600d9d3b0007493cbe818e0198506 SHA-1: 93069fdb850b73ef6dc218cbd5cbff2cfccdb796 SHA-256: 858e39678ec8821c32a1522c718b3c7dc0f84adffa0474754f2da3b13053d15b
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 of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.club/pify?keyword=no+answer+in+french', is flagged as a malicious redirector. This suggests the document is part of a link farm designed to direct users to malicious infrastructure, likely for phishing or malware delivery. No scripts were extracted, but the presence of numerous external links and the malicious redirector strongly indicate a malicious intent.

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.club/pify?keyword=no+answer+in+french
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5598/0450/files/bibuvakologev.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/zuwamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/resurrector_mech_serum.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/binugaxaje.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/junajelow.pdf
    • https://static.usrfiles.com/ugd/353d00_b4ba64674fa54fad929351bd3eecf23c.pdf
    • https://static.usrfiles.com/ugd/f09a9d_d71fd9e6a4cd45999291a78bf1484049.pdf
    • https://static.usrfiles.com/ugd/afe78f_f6ce7af213df431e9426ca164f9d6d5b.pdf
    • https://cdn.shopify.com/s/files/1/0432/3154/3463/files/karate_kid_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/xawojitiz.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648f.bin
fd4f361d6c90c8ba1497093f4e35a98856d9a903510675c52aa10818c6ba3bf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 4996 bytes
font_01_sfnt_off0000759a.bin
12b54e53e6eb28bd8aa1c54bd5de46b5e6b20cd2d098f48135c9e0b1d1fc1cbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x759A 10876 bytes
font_02_sfnt_off00009a73.bin
687267c9c3db9c7ba5925ba46e702bad05deca9442433a35c4d1c7c9873e4b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A73 16068 bytes