Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd9ae39fec00b79…

MALICIOUS

PDF

34.8 KB Created: 2020-08-15 06:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdcd9b582cd90f47f414ab5f6b9be342 SHA-1: e7dbf35df84320ac5619fd1612246b4637f60569 SHA-256: bdd9ae39fec00b79c1f4d47fabbf2083f674368399d6c74a6a87fa0abab812a6
152 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to unknown or potentially malicious domains, indicating a link farm or redirection strategy. The primary malicious URL identified is https://ttraff.ru/pify?keyword=epson+projection+distance+calculator, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the document's purpose is to drive traffic to this malicious infrastructure.

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=epson+projection+distance+calculator
    • http://gofusa.66-marketplace.com/uploads/1/3/1/4/131453603/lavijabuzegu.pdf
    • http://koxur.planningprotocol2.com/uploads/1/3/1/4/131482952/6890515.pdf
    • http://files.annagalatirealtor.com/uploads/1/3/0/7/130776718/979473.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/escala_cromatica_violao.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/dragon_age_origin_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2653/files/43751581204.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/lugusit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/kazedelotupumizixomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/16988711348.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/kizam.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/widuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/describe_the_central_dogma_of_molecular_biology.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0710/files/59905252910.pdf
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/jijudesipozepujugetuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/23130591493.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54903558396.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a64.bin
83a4229161698741ff6c7190f659520ac5d8692b1b521338b79475b20971e5c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A64 5100 bytes
font_01_sfnt_off00005bc8.bin
2d1af3e3e8a32dc0ca47573136c1308c8e728df529b37a1d406bbd4fd2889030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC8 10096 bytes

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