Malicious PDF — malware analysis report

Static analysis result for SHA-256 3960f5ec9c707511…

MALICIOUS

PDF

41.2 KB Created: 2020-07-27 14:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07bb813a734aaf8deecb52512438289f SHA-1: 7b04acb8edca71d74627984e82efb7b60b8697cf SHA-256: 3960f5ec9c707511ff4548382faba928931ca6d569bbd30738a681a90892aea1
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'manager not working in android 9', suggesting a lure to trick users into clicking malicious links. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or distributing 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.cc/pify?keyword=manager+not+working+in+android+9
    • http://files.glorytabernacleministries.com/uploads/1/3/1/3/131380596/xiwugumosonetexu.pdf
    • http://files.akaphipiomega.org/uploads/1/3/1/4/131408204/9556b5aff5.pdf
    • http://files.kaylacountess.com/uploads/1/3/1/4/131437516/7439496.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/gibinevu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/moguzaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/jejufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/getokuvafisutekajuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6273/0645/files/vaparitavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/19495467232.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/nalominad.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/paripus.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9221/files/94101196107.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/bijagaruxadelelajux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/52806111077.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/31772046946.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/zupupugutemuvegeronajovan.pdf
    • https://forums.androidcentral.com/showthread.php?t=980621&s=593e5ef89c59915762f1c2482022b99c
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://forums.androidcentral.com/showthread.php?t=980621&s=593e5ef89c59915762f1c2482022b99c
    • 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_off00006468.bin
569de5f6b3a546d4851acd7c5bf2af7d44310dd45d963f0afdb1e9ab59d99828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 4888 bytes
font_01_sfnt_off00007528.bin
0eac2ba5395b4501aac3e5d7c3cb76aa994df5852097f4d773aba4b2e6dd5d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7528 10036 bytes

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