Malicious PDF — malware analysis report

Static analysis result for SHA-256 7539f9ec9ac32d3e…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 18:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68ca059da5b1aba513e28ffe423d1d2e SHA-1: 43d0ae232e741643f5c89864c3521faac9954b3d SHA-256: 7539f9ec9ac32d3e1cebb15b1163263cc73fcf898eb9a668e7ec5369f187e452
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for SEO spam or phishing campaigns.

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=credo+catolico+pdf
    • http://files.nataliebeephotography.com/uploads/1/3/1/0/131070112/1006130.pdf
    • http://files.sacredgeometryalchemy.com/uploads/1/3/1/3/131383045/0b23844ce9fcb3a.pdf
    • http://files.missinglinkarchives.com/uploads/1/3/0/8/130874403/mekukarepuwago-kilogavuvamejo-dobewiwidusono.pdf
    • http://files.pwcasinonight.com/uploads/1/3/0/9/130969045/nitivit.pdf
    • http://files.frankgolden7.com/uploads/1/3/1/4/131453588/c13ea66cc45dbad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/bodyboss_method_fitness_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/bavinixasowev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/forming_a_concrete_sidewalk.pdf
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/banking_awareness_by_arihant_publication.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/zogoladefodok.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/gaxinevadegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/florida_durable_power_of_attorney_form_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/65776994703.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/xilibutikaruta.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/tewewefiriwibufaxisakemi.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_off00005fa6.bin
020d22568b6d322eafdaa5f9bac807ecea312b50a31bd5be3db079bd16f57e4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 4876 bytes
font_01_sfnt_off00007046.bin
f722fc8469e4637cb66f2727cc7e5b166f7aa65648a02d6bad2424b367e4c286
pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 10136 bytes