Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ac1db159b31352…

MALICIOUS

PDF

42.4 KB Created: 2020-08-20 23:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36ed17a2cf59d55504cee34397963e03 SHA-1: 23c4067418bc3b6502c9f4e2aa5e4f5d652e1953 SHA-256: 12ac1db159b31352cd2d9bb4217705f4e0dc32fbe74bf63b35ece830157baa6c
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, suggesting a phishing or SEO poisoning attack. The embedded document body text, while garbled, contains a URL that matches the malicious redirector found by heuristics. This indicates the document's primary purpose is to drive traffic to malicious sites.

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=badnaamiyan+song+mp4++pagalworld
    • http://files.pagesofmypinkdiary.com/uploads/1/3/1/4/131437561/jisibiluwab.pdf
    • http://files.hofeichan.com/uploads/1/3/2/6/132682892/budetemamulupok_lofabobapuginup_jukagiw_lajatuvuvax.pdf
    • http://kirabiguf.lyriquedance.com/uploads/1/3/1/0/131069839/maloziwibadinuf.pdf
    • http://files.aplacecalledroam.com/uploads/1/3/2/7/132710748/361792.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9209/0784/files/14292242382.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/blue_planet_project_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/rojufapovavilasere.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/pdf_adirondack_chair_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/b_forman_park_pultneyville.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83390791822.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/53705108664.pdf
    • https://cdn.shopify.com/s/files/1/0430/5210/5881/files/luwikikelofosupexora.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2145/files/biology_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/gigujipofinozujaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/71133924933.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/collocations_with_make.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/forakubadofidan.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/network_security_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/catia_ka_full_form.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_off00005a7c.bin
ea1ced79b1a3d56acaf51d0f324173f6e494ccfe23364b60a567ecc33d77d72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7C 5608 bytes
font_01_sfnt_off00006d9c.bin
bb0df2cb607828355c97839c99b37734d471aebc030deb611c3c4e1f0ca16f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9C 14140 bytes

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