Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6a17bc53724c31…

MALICIOUS

PDF

43.6 KB Created: 2020-08-15 02:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 125830dae6afa42679ea053067fccdab SHA-1: b9a6332b9690536647ef89359edb12c0d60dff8f SHA-256: cc6a17bc53724c31c920ce3348bdf7e7e9933a402f6eec0a710c784aba83cc14
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as a download for an Android game. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious infrastructure. The document body, though heavily obfuscated, contains the target URL, reinforcing the lure.

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=super+street+fighter+android+apk
    • http://files.imarsonline.com/uploads/1/3/1/3/131380413/6c76ebc2.pdf
    • http://files.thepinkevent.net/uploads/1/3/1/4/131482997/kopuwomep-pazulon-lukeman.pdf
    • http://fokeg.rachaelhudes.com/uploads/1/3/1/4/131407406/3773259.pdf
    • https://cdn.shopify.com/s/files/1/0433/9453/1484/files/9156179738.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/kowixujaramizurul.pdf
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/avery_address_label_template_16_per_page.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/navovaxagit.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/general_chemistry_formula_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/finurimida.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/lovakomab.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/92715782061.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/the_name_of_the_wind_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/pdf_candy_desktop_pro_2._53_review.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/nj_driver_s_manual.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_off000055f2.bin
28d1cc2fe54018c3634c600d898f53f15faad0c12a0669639af91234882ad5bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x55F2 5436 bytes
font_01_sfnt_off00006864.bin
ef39476d607d695aa9e68ae9620be0180451005fb984040e207a0f4ff64ab1a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6864 10576 bytes
font_02_sfnt_off00008ca7.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA7 16092 bytes