Malicious PDF — malware analysis report

Static analysis result for SHA-256 0494a001365f303a…

MALICIOUS

PDF

59.8 KB Created: 2020-08-06 11:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aab7b2f58f6708aad5e468c0125db28 SHA-1: 0926f3c5d432dde0c485ef34159678c9f1c4936b SHA-256: 0494a001365f303aef65ee96a3110e475b85e703c915aeb79a91c5cbca9401dd
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to academic topics and URLs, suggesting a lure to a malicious site. The ML classifier strongly indicates 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.cc/pify?keyword=vector+equations+of+lines+and+planes+pdf
    • http://files.lavenida-lane-danger.com/uploads/1/3/2/6/132695280/2491338.pdf
    • http://bojuxul.prinevilleredemptionhouse.com/uploads/1/3/0/7/130739430/zuxipekozurujon.pdf
    • http://files.businesstestsite.com/uploads/1/3/0/7/130776420/b6464d3da76.pdf
    • http://files.riverbendoutdoors.com/uploads/1/3/2/6/132683165/0b159ae59.pdf
    • http://sawaja.hazsunsetsphotography.com/uploads/1/3/1/4/131438177/1be6f6144e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/15834788230.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/kipumexubakapadosofobon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegegezanonipilupe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4237/1741/files/jegalujukepax.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/bsc_agriculture_3rd_semester_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/vedalojezedexev.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/rumiforija.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/sowomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/lezezisumikux.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/african_charter_on_human_and_peoples_rights_1981.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/umass_d_logon.pdf
    • https://cdn.shopify.com/s/files/1/0449/0254/7611/files/engineering_drawing_isometric_projection_problems.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_off0000a641.bin
7a65daa099f69ba388378d89abd63741edf2ef0b83cbda750e4e249a9c4a9ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA641 5240 bytes
font_01_sfnt_off0000b82b.bin
a39f30ee46f53b9959b2837279dc451c5ac7d921db6820f3af2e23544b54944e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB82B 12808 bytes

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