Malicious PDF — malware analysis report

Static analysis result for SHA-256 7767272b5b337ad2…

MALICIOUS

PDF

47.7 KB Created: 2020-08-18 15:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b678aaf619088804290eaeaad705a32 SHA-1: 46bbbf7bca9b578d3183edced11915ee4faeee80 SHA-256: 7767272b5b337ad2fdd2094404b1574df8bdc9de826b9bf9401c7a447ee8ac9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, identified as a link farm. One of these links, https://ttraff.com/pify?keyword=chupke+se+song++mr+jatt, is flagged as a malicious redirector. The document body also contains this URL, suggesting it is the primary lure. The presence of numerous links, including to Shopify, indicates an attempt to obscure the malicious destination and potentially leverage benign-looking domains. The ML classifier also strongly indicated maliciousness.

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=chupke+se+song++mr+jatt
    • http://files.garritylpc.net/uploads/1/3/0/7/130740249/4994035.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55742160690.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/61740020770.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/30754599913.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/rulemojegixirusuza.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/autentico_2_core_practice_answers_pg_9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/10700890979.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/33429071451.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/kizimorowo.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008744.bin
e1837f03f07712bf73a2f75bcc85e412e2c5ee370dc18a96e53046e608361079
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8744 24792 bytes
font_00_sfnt_off000052b9.bin
d50efcf797061149c807185c71bfe11506ba05caa54e21e964de9b08e1080174
pdf-font-stream PDF embedded font (sfnt) at offset 0x52B9 5248 bytes
font_01_sfnt_off0000646c.bin
ee19efa653c96eed1ac6f7e4fbbbce757ee47a0db026fc11cff16480e3a70575
pdf-font-stream PDF embedded font (sfnt) at offset 0x646C 10120 bytes