Malicious PDF — malware analysis report

Static analysis result for SHA-256 673cd6c1acd37cfb…

MALICIOUS

PDF

52.3 KB Created: 2020-08-17 08:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c07cb56dc0e6230b84f916996c1ab78 SHA-1: 111ff13c95aeede5554588b2f511f4c85e81c690 SHA-256: 673cd6c1acd37cfbbd19b648527fbb81d78867b489de32edc397aa29621506a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=battlenet++so+slow`, which is designed to lure users. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, many pointing to benign Shopify domains but also including other unknown domains. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=battlenet++so+slow
    • http://files.joshphotographer.com/uploads/1/3/1/3/131380107/xudevom_kaxifixu.pdf
    • http://nenat.thetorrancecarpetcleaners.com/uploads/1/3/1/8/131855997/3031422.pdf
    • http://mateviw.goodheartedgang.com/uploads/1/3/2/6/132695829/kekixu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/beware_of_pity_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/negodibuwuwasujetazituza.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/binary_addition_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/mario_benedetti_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/21628764984.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/transformers_g1_autobots_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/din_fastener_standards.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/urticaria_multiforme_icd_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/53593560525.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5004/files/88037045711.pdf
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/75981200441.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006304.bin
aa0ae380a03be0179c0e868a9df9aac8435cb6c04a3222e02bd793a416e1249f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6304 4464 bytes
font_01_sfnt_off00007240.bin
63f019dff5fa66ce254f8ec0f5ebdd5c99fc9b2aefd3036a46ce71f5faddaaf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7240 2016 bytes
font_02_sfnt_off00007b98.bin
170eb4af26acb561f154b8351c61b0124b3534d8d9ecb275949d1fd8f4ad218e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B98 10816 bytes
font_03_sfnt_off0000a083.bin
f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA083 16164 bytes
font_04_sfnt_off0000b57c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB57C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.