Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f57cf6a4dcfade8…

MALICIOUS

PDF

39.1 KB Created: 2020-08-13 23:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1633d729ccc790cf09010451b8e1d670 SHA-1: 5ceda3a5d92aea16d9bd1335b475ae9c5b860e4d SHA-256: 6f57cf6a4dcfade85828d34eb0dfa2d8c9c978928336972f38dc2e268829e9b6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. This suggests the PDF is designed to lure users to malicious infrastructure, likely for phishing or malware distribution.

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=lagu+the+chainsmokers+closer+cover+kabira
    • http://mibopad.billchosycamore.com/uploads/1/3/2/8/132814930/zogebajexeleg.pdf
    • http://files.yael-levy.com/uploads/1/3/0/8/130814169/jepolomo.pdf
    • http://files.toddbennethum.com/uploads/1/3/2/8/132814241/zurizusiku-lozijolujisali-wifuzejafi-vapiwa.pdf
    • http://files.dougandjaciscreations.com/uploads/1/3/0/7/130776031/6550158.pdf
    • http://files.communitycreditinc.com/uploads/1/3/0/7/130776743/9fea2c3e565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7110/1338/files/zixopajefiluwijoberurin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/short_film_treatment_sample.pdf
    • https://cdn.shopify.com/s/files/1/0448/9786/1787/files/celiachia_dieta.pdf
    • https://cdn.shopify.com/s/files/1/0433/4488/7963/files/fufodopalivemavemagezan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/beloromawodosuxaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/34053991542.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/mixaguta.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/98625354885.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/susuzovitinosajiva.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/lights_on_yoga_sri_aurobindo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/zuwapugowugenix.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/lafilulenusigidopa.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_off00005bdf.bin
4fc7e623f08e85035db269167c2eaa74369d152015745437bb466317d073caa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDF 5416 bytes
font_01_sfnt_off00006e2e.bin
5697db654c24328f84a0ce69c6e0cd4122233016f7474499ca04c227961d3045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 9812 bytes

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