Malicious PDF — malware analysis report

Static analysis result for SHA-256 20822fa6b79aa282…

MALICIOUS

PDF

53.8 KB Created: 2020-08-30 10:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 268cc899d49257ef502f06143a3e0406 SHA-1: 6404ed2bc493695591c1516781e7e04905cd4e9c SHA-256: 20822fa6b79aa282afca96911dcda8f266e141874c63bd74d3259a99e315737e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=boom+beach+hooka+guide, which is also listed as a malicious redirector. Additionally, the file contains a PDF link farm, with many links pointing to static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute content. 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.com/wix?keyword=boom+beach+hooka+guide
    • https://static.usrfiles.com/ugd/b8c837_897adf9c4edd4691803fa37a7a654b2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_00dd6d23b30d4a7fa91d0b87e0244c30.pdf
    • https://static.usrfiles.com/ugd/cc03df_c1efffa60ca049969187fa25051c6b2b.pdf
    • https://static.usrfiles.com/ugd/93971e_8fcec68f0f9c400086fbcf3015f2a1cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e80f3863e9394ff49499568e03ae0785.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/37649876962.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_0e6500ca4eba4419a53db9d20c4e4f87.pdf
    • https://static.usrfiles.com/ugd/daca0d_7358711d4f1448419383e8a9408fd1ea.pdf
    • https://static.usrfiles.com/ugd/cf14a4_9babf58e1b5b4cc69834928113a30eef.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1d2c020d34c41ef80471d436125ba5f.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/9994228265.pdf
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/fovesopij.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/41412444507.pdf
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/laporan_pendahuluan_orchitis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7605/files/pdf_architect_popup.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_off00008480.bin
a463f15973aabe89a2f7b3dcf69c9a5d4dadda57b76d530351990529d1e088f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 4996 bytes
font_01_sfnt_off0000957b.bin
1ec06c4a20e49d3d59c82834f5e2eb8d071440c2e9bbf02f98b99e8ce140b567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x957B 12236 bytes
font_02_sfnt_off0000bc8a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8A 4324 bytes

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