Malicious PDF — malware analysis report

Static analysis result for SHA-256 753ac0c4e96de4fe…

MALICIOUS

PDF

44.6 KB Created: 2020-09-01 20:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223a70dba40a718d3f0669a59cfc410c SHA-1: 448d4c7a1f3a1bbc006b7f573123459dbb606ca0 SHA-256: 753ac0c4e96de4fedd4766394f443d414d72ce17196b47f3b2fc2fcc80f7162a
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely as part of a phishing or scam campaign.

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.me/wix?keyword=french+to+english+translation+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/238140_99fad95c021d4aceb9ae6b3e74f3554b.pdf
    • https://static.usrfiles.com/ugd/4b68be_14b8050526c8494e805d5af1b987ff9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e4d68cb59ec4e08b0337687bd48d99e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7d06ffd7ee54146a207f73ea5f90603.pdf
    • https://static.usrfiles.com/ugd/625844_6244d25ab7104033834b78e153c24949.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/47015305893.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/wallpaper_iphone_xs_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/76675751608.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/nugurozimujajok.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/22172584197.pdf
    • https://static.usrfiles.com/ugd/eb6612_11fe796700884763842b33790ff849f0.pdf
    • https://static.usrfiles.com/ugd/895bef_98179ad95bc640b8ad309599587ab337.pdf
    • https://static.usrfiles.com/ugd/3aee12_53aa97b3e7af4445a7131c351c3410c1.pdf
    • https://static.usrfiles.com/ugd/f55bec_625ec3c2191e4d13a6371a52aba218b6.pdf
    • https://static.usrfiles.com/ugd/756799_ba51dd5fd0274c33978ec913bc62cc74.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/luvurumiwibozas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/96007493333.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_off00005b01.bin
86fc6fc68c012adb387de3e1a81394d61767a42bb10f06d5f2477af89764daca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B01 5100 bytes
font_01_sfnt_off00006c5c.bin
40af307121b294084070a58cea41a79308a77d37e77a8355f88004fbb1a5dbc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5C 10576 bytes
font_02_sfnt_off00008fdc.bin
9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 16160 bytes

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