Malicious PDF — malware analysis report

Static analysis result for SHA-256 0660f177e076f368…

MALICIOUS

PDF

48.1 KB Created: 2020-08-20 01:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acd976f0c73eb1e7ac4aa6bf4dfa6b41 SHA-1: e0d35b71f03e2e028237548ba1d24f1607c5a8b4 SHA-256: 0660f177e076f3687d8510e6fd6ff075da0f937a7a6c31d76e0195e4599c9bdc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector leading to a page offering 'ccna 2 pretest exam answers'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the document body and heuristics indicate a phishing or scam attempt.

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.cc/pify?keyword=ccna+2+pretest+exam+answers
    • http://vonugaz.picasso-moments-bakery.com/uploads/1/3/0/7/130775627/legamixupogaseje.pdf
    • http://mozopona.hannah-ayers.com/uploads/1/3/1/3/131398294/jozufofupe_kesizuro.pdf
    • http://files.writtenapocalypse.com/uploads/1/3/0/7/130739895/a1fbb70dea6c74e.pdf
    • http://files.padovecote.com/uploads/1/3/1/4/131438137/261010.pdf
    • http://files.mrsea.org/uploads/1/3/0/8/130814032/84f32396f05.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalekubaserigudopen.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6138/files/xezomeziwivupar.pdf
    • https://cdn.shopify.com/s/files/1/0455/5584/3237/files/legend_of_sleepy_hollow_short_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/fewajobubetevef.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/kilugukadutetotozutusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/95661118804.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/zagilepixabixudonexesok.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/rimadetedepiw.pdf
    • https://cdn.shopify.com/s/files/1/0459/9051/0754/files/67104562905.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_off0000728d.bin
fb04c1dd731a135982b2873e406b1ef200e08e0a5cf6ed86750e672ef0ad81e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728D 4992 bytes
font_01_sfnt_off0000836c.bin
a84c4e3fb8da2765a44912899280c0231778c1b6a39e8d54ce3ef03cdd920b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836C 9924 bytes
font_02_sfnt_off0000a587.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA587 4324 bytes

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