Malicious PDF — malware analysis report

Static analysis result for SHA-256 080e7f83eb2b6580…

MALICIOUS

PDF

67.1 KB Created: 2020-08-25 04:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f57842955e98e06f5960e8a675b00b67 SHA-1: 7af28e8815e9d2d6cf70d625629718e3664c0ee6 SHA-256: 080e7f83eb2b658029a555f8c71dc9a26f986fd02da4e48e5dcf3fddc185d2ba
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=inquisitor+greyfax+datasheet. While the document body is heavily obfuscated, the presence of embedded links and the heuristic firings strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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=inquisitor+greyfax+datasheet
    • http://files.kengallucciocup.com/uploads/1/3/0/7/130775759/woxudukipefonez.pdf
    • http://menajixok.mrsvalenzuela.com/uploads/1/3/1/4/131482853/3537098.pdf
    • http://nupego.beach-music.com/uploads/1/3/2/7/132712207/0b839.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/la_perla_secreta_mary_balogh_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/51419283574.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/firux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/nutrisi_hidroponik_ab_mix.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/16764671755.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/boludubijazijomotewiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/perkembangan_dan_klasifikasi_akuntansi_internasional.pdf
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/oliver_twist_1948.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/zowikezofagagenuwupufe.pdf
    • https://cdn.shopify.com/s/files/1/0440/6660/3158/files/28459808482.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/repojano.pdf
    • https://cdn.shopify.com/s/files/1/0435/9258/1288/files/chakravyuh_2012_movie_480p.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/11982648742.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc3e.bin
d827fb59c034ebf763b451cb0ee0ad1d979d6a5050392e6fa09edeba21d6ff49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3E 5252 bytes
font_01_sfnt_off0000ce0f.bin
43aa048547f083870ac325b33cd4ed9018ca0ae751220e33547951b4a937e20b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 10312 bytes
font_02_sfnt_off0000f129.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 4324 bytes

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