Malicious PDF — malware analysis report

Static analysis result for SHA-256 1350710c786bfd27…

MALICIOUS

PDF

49.0 KB Created: 2020-08-03 06:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fab1f001f9b243fd164d11940cddcbb5 SHA-1: cf3f8bdb88d399ed02c4f4bdc8de3341016f18e1 SHA-256: 1350710c786bfd27981b352c3444a13ad19cd86e6b7d7d3792ba9131793121cf
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to game cheats and the malicious URL, reinforcing the lure. 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.ru/pify?keyword=bleach+brave+souls+cheats
    • http://beximogep.kruisinkanines.com/uploads/1/3/0/8/130814788/xokedalazefobaxa.pdf
    • http://files.theetcenter.org/uploads/1/3/0/7/130776041/3714838.pdf
    • http://files.oneofakindent.com/uploads/1/3/0/7/130739366/8871146.pdf
    • http://files.readingaustralianrulesfootball.org/uploads/1/3/1/4/131406437/wurepateter-mubuwibawo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3125/7510/files/midland_75_822_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/8261/0843/files/obelisk_risk_of_rain_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/zaromomilowebikaluxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/24282565342.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/cat_3126_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/kotofowepisageli.pdf
    • https://cdn.shopify.com/s/files/1/0434/3096/9511/files/77340875578.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/toxanimefawuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/77556923457.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/17076316482.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9709/files/pusifar.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/48276975314.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006965.bin
d55a791daa50bf274b1b0941b513de9e6f6a599b8ef063d72c9dddaf793b6535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6965 5136 bytes
font_01_sfnt_off00007adc.bin
ee0c499c2e570ab0e977e62441d992ef7e14b8b7d6f73d5d28d258488b2902d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADC 11564 bytes
font_02_sfnt_off0000a1bb.bin
c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BB 16144 bytes

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