Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae268d483954048…

MALICIOUS

PDF

49.2 KB Created: 2020-08-21 13:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec518cfa77de2ea68687b6a13293b60f SHA-1: 62ca2b086ce178d7aa77a9c8a898e544000a7ced SHA-256: 7ae268d483954048b4fc13939e2878af949afbb5632e35052444766802a64abb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the same URL found in the malicious link heuristic, suggesting an attempt to direct users to potentially harmful content. The presence of many external links also indicates a link farm, often used for SEO manipulation or to distribute malicious content.

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.com/pify?keyword=treatment+guidelines+for+complicated+uti
    • http://files.lezgetbaked.com/uploads/1/3/1/4/131453188/nagivov.pdf
    • http://files.followoncricket.com/uploads/1/3/2/6/132680890/7542171.pdf
    • http://tarijiwi.nigella--sativa.com/uploads/1/3/0/7/130739561/bugupuwas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/31369765400.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/shingeki_no_kyojin_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/can_you_refill_a_bic_lighter.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/hitchhiker_s_guide_poster.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7922/files/83341276825.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/zizaserev.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/32935951772.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/gukowovuzowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/11861200720.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/teluluritevuzubib.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_off00006d38.bin
886090ca2c2e20634e575e643ff8015cc00f4aea094acf19d2a58a6d7f043478
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 5424 bytes
font_01_sfnt_off00007f91.bin
4cd3248b0187e82995dbcb0c4608449b26b8fe20c8d7d7bf9a644fa8dbdd1645
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F91 9988 bytes
font_02_sfnt_off0000a1e7.bin
7603e3e57e6b1a92f5b3ca7a4d7066c4311a705263172e05f9cf7f27925f2f43
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E7 16284 bytes