Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b57380bc489032b…

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 21:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 388d12813a734b7153fd80a565694dc5 SHA-1: 19956f5d9a2f7b985b43ec6d43dc836d022df626 SHA-256: 9b57380bc489032b65d51666895fe08f17ca94af1e781acd41034aa073e06830
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.club/wix?keyword=concrete+batching+plant+calibration+pdf, which is likely intended to lure the user into clicking through to a malicious site. The presence of multiple Shopify-hosted PDFs suggests an attempt to appear legitimate or to host further stages of an attack.

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.club/wix?keyword=concrete+batching+plant+calibration+pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/pujowizafemadufodixekera.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/love_your_life_not_theirs_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/41004681920.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/78052635841.pdf
    • https://static.usrfiles.com/ugd/21e6f2_23bfb7f54d2241fa8f00dc426b2dc8ee.pdf
    • https://static.usrfiles.com/ugd/1849a1_b54aada7f6134d19be3eab9a3cb924df.pdf
    • https://static.usrfiles.com/ugd/35e1ce_6bda97218629455dbc4eef6a5672bcdb.pdf
    • https://static.usrfiles.com/ugd/5360f8_a5faf24fd7eb4f7381c023ab7bd89d50.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_8f4c8f558fb448a6a8aa8a9c860ae028.pdf
    • https://static.usrfiles.com/ugd/1be480_77c7c15a7fc642ca96328cff531c589d.pdf
    • https://static.usrfiles.com/ugd/585b1d_6ab38b50cd364dc68abe8901549f8e4b.pdf
    • https://static.usrfiles.com/ugd/625844_42a277b403ee4b989c2e60d336a682a2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007248.bin
d7bd91925a23f082b18e424972014a93b129bf9da287012e5636733d2e21eec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7248 5284 bytes
font_01_sfnt_off00008437.bin
70fd6bc388211943dac915e94d7cf974e8727d8ff16b644b29931ab85a4f603b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8437 10576 bytes