Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c74d3d521ad5c0…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 18:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f3a801baeec48336f1000713b4cb42 SHA-1: 2805446f222d647a2701f323f7ced3d15846177b SHA-256: d4c74d3d521ad5c06d2a15a0bc8de56cd640a54f069c2738ef38fb2a5941385c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=man+united+psg+match+report'. This URL is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, flagged as a link farm, further supports a malicious intent to drive traffic to external resources. No scripts were extracted from this sample.

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=man+united+psg+match+report
    • https://static.usrfiles.com/ugd/2c608b_50f3b3d9e19d4b5e9c6fc952c5db7087.pdf
    • https://static.usrfiles.com/ugd/98e298_c1808f216d034a028715b7f6ba870815.pdf
    • https://static.usrfiles.com/ugd/b8c837_96192b8ab6bf4784b6c7c8c9a3af1dd8.pdf
    • https://static.usrfiles.com/ugd/a18aa6_282340cc6c7f4dd585970dcc91cf6b15.pdf
    • https://static.usrfiles.com/ugd/3f80ec_6fbcf5cdb95b420fbdc37828d131e7e4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/tosilofomofebubuwolixobum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/the_i_am_discourses.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/jutegatinelanitud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/python_copy_array.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/anglo_japanese_alliance.pdf
    • https://static.usrfiles.com/ugd/299074_8622a79991e94d778360161ab2a279b5.pdf
    • https://static.usrfiles.com/ugd/ab922d_6e455e3934f2445995c3d92e25b83933.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_406be60f402d480a9e6867d2bf590537.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a60.bin
c1d80df1f7a3a35c61a9cfaaf6176e528e3fa7816e3888f9cc345784a5457fd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A60 5344 bytes
font_01_sfnt_off00007c56.bin
727960562210efafb83d148d33452fe97949f4f18b187c0efcb2305e921a4dcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C56 10244 bytes
font_02_sfnt_off00009f66.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F66 4324 bytes