Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae717890047c8c1…

MALICIOUS

PDF

64.6 KB Created: 2020-08-11 02:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f8c16f416b5559f0955bf69078f922 SHA-1: c3d9e6f9d3c2fa99e00c3aa5d6adf8547c27d465 SHA-256: 1ae717890047c8c1b32b571dc3e0db65c558335b57295c3b31eb830128f4f8af
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=positive+affirmation+cards+pdf, which is designed to lure users with a seemingly benign document title. The ML classifier strongly indicated maliciousness, and the PDF structure itself suggests a link farm for SEO manipulation, likely to distribute malware or phishing content.

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=positive+affirmation+cards+pdf
    • http://files.exeterconsortium.com/uploads/1/3/1/3/131380875/jijive.pdf
    • http://files.daybreakersolutions.com/uploads/1/3/0/7/130775987/addba17.pdf
    • http://files.1divashop.com/uploads/1/3/2/3/132302716/sutibogoji-vuloja-tanuponinun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/american_standard_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/aliens_versus_predator_versus_the_terminator.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/employment_contract_qatar.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/96235910218.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/padesavuko.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/fitapepesodimozesezuparo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/salient_features_of_genetic_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/60140661482.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/25150378693.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/fodovemi.pdf
    • https://cdn.shopify.com/s/files/1/0439/7232/9630/files/menace_ii_society_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/70918238044.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/
    • https://cdn.shopify.com/s/files/1/0427/6797

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bee7.bin
4e56c8725ddffd864402ece6c3f94dbc3e3e2904b996a5e0a43003014be8fcac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE7 5328 bytes
font_01_sfnt_off0000d0f5.bin
a48d88642484c9fc6dba60dc960a85ad2ed46fdb9b07e702fd5e605a3a053f0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F5 10632 bytes

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