Malicious PDF — malware analysis report

Static analysis result for SHA-256 089114897db82662…

MALICIOUS

PDF

32.6 KB Created: 2020-09-16 21:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 014ce90f75e0ac291cab135b85da60ee SHA-1: b6d3a681b968ad6e97dc68869f7e12bfdaf9c6db SHA-256: 089114897db82662b683e4758806ca2f222956bd8283786bae98b9f891570375
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to a water heater manual and the malicious URL, suggesting a lure to a phishing or scam site. 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.club/pify?keyword=rheem+warrior+glass+water+heater+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/katanokako.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/favudupupojikom.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/adenocarcinoma_uterino.pdf
    • https://b9224086-0dd0-4def-9d61-2c6ccb6037e2.filesusr.com/ugd/681527_3cee98e11238480ea71cec886fad1322.pdf?index=true
    • https://003e47b0-e621-4f15-b508-85634e5081f3.filesusr.com/ugd/a58502_96a6ee1ae4844236941ecd8661e9915a.pdf?index=true
    • https://d1fcb168-c980-41cc-9420-3ce0fa620aad.filesusr.com/ugd/d7d6cd_8cca2731bf7344d4a3574d4032b12e08.pdf?index=true
    • https://4baf81d8-5d08-4c4b-8929-084171f2a590.filesusr.com/ugd/bc0b97_f5d371f300ff4d0c814ec540df11b446.pdf?index=true
    • https://1059b2d6-31ba-490e-8649-5aa729ada64c.filesusr.com/ugd/b926a8_0497df5c00a54cc6967e29e8e087bce8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/84179522765.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6295/files/dajabuvujigivon.pdf
    • https://cdn.shopify.com/s/files/1/0466/3548/3301/files/cat_vs_dragon_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/wemedagowafoni.pdf
    • https://cdn.shopify.com/s/files/1/0437/0055/1830/files/11318690515.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/pituvesarunetavabukotoxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5637/9557/files/peptic_ulcer_perforation_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/zoliromojanadigemewokabov.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9557/files/xeselevunoredetokiwudim.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004414.bin
66d92a1453663caa78e3144648a7183f4c41a10e5b70e39282daa5fbfefbecf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4414 5200 bytes
font_01_sfnt_off000055aa.bin
df4e28fa8fae04fc39c42b0a65add145fc730b12cd145110ffae40b3999a9a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55AA 9288 bytes

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