Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c4042ff572cd8a…

MALICIOUS

PDF

46.4 KB Created: 2020-08-31 14:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1d8c8533b7ce3bb8da6d3f6d23ace8 SHA-1: 7800b1ef5963d6c066f15db6a383465d9d05ec7a SHA-256: 97c4042ff572cd8a5a1271c6fdefc396e976578b5ff1f21472d0f5f54430eb59
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=enchanted+gold+bloodrobe+guide', is flagged as a malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery. The ML classifier also provided a very high score, indicating a high probability of malicious intent.

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.ru/wix?keyword=enchanted+gold+bloodrobe+guide
    • https://static.usrfiles.com/ugd/fe83c3_0223c3f0ed34405db7c354e992d14984.pdf
    • https://static.usrfiles.com/ugd/b8c837_93df851ba33a428ba21dde46959a3e73.pdf
    • https://static.usrfiles.com/ugd/225520_a8f2169d35874de5be0340225929b9aa.pdf
    • https://static.usrfiles.com/ugd/32acb1_cd4a50d32433423aafc91876a867e404.pdf
    • https://static.usrfiles.com/ugd/b8c837_393e1c2745cd476e9e03f675baba9934.pdf
    • https://static.usrfiles.com/ugd/fac845_ee6671cd7a034413b835748c63c96824.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d131643174e403598696e0872934691.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_c2adbc5170924941b0f7fd8666ddd2fe.pdf
    • https://static.usrfiles.com/ugd/6cf392_cff7b44737dd4b28b15c0e221fd58d1a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91489653134.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/lonesala.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/jaxatubisavuvewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/89976429695.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/41068748006.pdf
    • https://cdn.shopify.com/s/files/1/0436/0713/0270/files/foxaz.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_off00006798.bin
27f5de55fa171963c7751e0e0203f319f72d40ad2097d0ea66593f7d124f19ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6798 5000 bytes
font_01_sfnt_off00007884.bin
6e174d4004f5af681d5275a7a2506ecb9eb3b83aa99e49dbc887c83335188b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7884 11544 bytes
font_02_sfnt_off00009e56.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E56 4324 bytes

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