Malicious PDF — malware analysis report

Static analysis result for SHA-256 246142f632a0043c…

MALICIOUS

PDF

80.0 KB Created: 2020-08-03 04:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0df2c68a1459e220bc9c2e8565673579 SHA-1: e5a8c98284bfe8611fb7d3f6b5143d44f7f924e1 SHA-256: 246142f632a0043ce21735ef8ff50543f262e0606a8cbdc4ba69bb1c67686344
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=brad+traversy+github'. Another heuristic flagged a large number of external PDF links, with the first identified as 'https://cdn.shopify.com/s/files/1/043422056600/files/78858854468.pdf'. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or heavily obfuscated, but the presence of the malicious URL is a strong indicator of malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=brad+traversy+github
    • http://files.glazieltd.com/uploads/1/3/1/4/131437532/1730807.pdf
    • http://maseb.queencityproam.com/uploads/1/3/1/6/131607712/8937005.pdf
    • http://files.graceelmira.org/uploads/1/3/1/0/131070459/magulorotuma_bejozeb.pdf
    • http://files.imaginariumindy.com/uploads/1/3/2/3/132302718/lipasazotopov.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/78858854468.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/41673625605.pdf
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/ravaxit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/tovopevagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6922/files/adventure_time_season_10_episode_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/ruwobadufud.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/jarotoweno.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/princes_of_the_apocalypse_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/darokijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/zesulebefawuripob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/37326104589.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/12116436485.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/fadivuwogozewezag.pdf
    • https://cdn.shopify.com/s/files/1/0436/7292/8409/files/19842690442.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea7.bin
39e7a752c9053cbf42cce0a4680fd91e3e9ede5b0157a27a2ab6dd47b2186634		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA7 5072 bytes
font_01_sfnt_off0000dff5.bin
b672ed32057b611730be586441f877a1b206a236b78c91f14c1564547a1c78c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 2188 bytes
font_02_sfnt_off0000e9fc.bin
40df919b48d379e9dbe1e706672cb0b3e0f4ddfa6996323bded9b637fcd7bfed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 10644 bytes
font_03_sfnt_off00010e72.bin
0abc301a75bcb62837e1b39699efeab516a7677702cdcadbd45931fa139eeed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E72 16240 bytes
font_04_sfnt_off000123ab.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123AB 4324 bytes

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