Malicious PDF — malware analysis report

Static analysis result for SHA-256 438cd516310dc6b1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-01 09:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83ca1d80dcda100ef170b6b28b273483 SHA-1: 2e3dfecda40283582627c0914ea800f7b6e45e57 SHA-256: 438cd516310dc6b1aa173ce4fee4432e328238567a2b4e6daec0d1c08dd85a28
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to a URL designed to trick users into downloading a file. The document body, though heavily obfuscated, contains text that appears to be a lure for a game download. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious content.

Heuristics 3

  • 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.
  • 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/pify?keyword=axis+and+allies+iron+blitz+download
    • http://files.methodistchurchguyana.org/uploads/1/3/0/7/130740297/zovufobalededi-fafesiluguz-noriroxokifom-pafexa.pdf
    • http://files.carmelbayhoa.com/uploads/1/3/0/7/130776755/dolumizojubef.pdf
    • http://files.modestgirlzrock.com/uploads/1/3/1/4/131408024/tewivigi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/43197889222.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3765/files/48944334647.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/vusemugaxamexibevobutox.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/53611262217.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/tidagivagebipozum.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/nobanakaperugovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/vesoxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/seretalonagazojaxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4755/8037/files/juxosesa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3081/3592/files/kudupipigenosivuligizekoj.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/
    • https://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa9.bin
7cebaec10a40664e32e1886f9a2d702a7d00650de476f6676af8cc0b5d71da89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA9 5156 bytes
font_01_sfnt_off00007c59.bin
bba6386846047747cba91a55a9ec3cff19a3934f6f8cca6d8d768bc96871bc33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C59 10036 bytes

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