Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca64b2796578d8a…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 23:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9fcc535423ff5fc6df20cf27f81c251 SHA-1: c5440d5c9a413b9d422d3f403aa022cff37f2395 SHA-256: 2ca64b2796578d8ac2c5588fe9e2b5e36a4f5d4abad374e1738acb2960a12e72
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious payload. The document body contains text related to 'Calendario rusia 2020 pdf chile' and includes the malicious URL, suggesting a lure for users seeking this information. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning attempt 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=calendario+rusia+2020+pdf+chile
    • http://files.leonardsportsassociation.com/uploads/1/3/0/7/130738596/mujowipovopaw.pdf
    • http://files.dioceseofquincy.org/uploads/1/3/1/4/131409309/cf6c63.pdf
    • http://files.ellengiggenbach.com/uploads/1/3/1/3/131383837/e41882fabb5eb.pdf
    • http://gumafuv.daddysclinic.org/uploads/1/3/1/4/131453133/gukanupelez_vojanivozofoju_loruwodowe_fawefuvusoz.pdf
    • https://cdn.shopify.com/s/files/1/0449/8338/6280/files/annona_muricata_l.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3380/files/cascaded_differential_amplifier.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/ropotebukibenenaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/navinikusavupatara.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/gorijinonozupasufadovilu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/94057929054.pdf
    • https://cdn.shopify.com/s/files/1/0432/9911/1070/files/32150403802.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/neet_chemistry_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0430/8097/4490/files/adjectives_worksheets_for_grade_4_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6509/5845/files/63473736818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/64241618534.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066b3.bin
4c1c84f2faa2c2b91c1502c7be961345adf87d324c82aecb3e9433476e42ce6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B3 5340 bytes
font_01_sfnt_off000078cc.bin
e5365f1e69ba635ad3b4843b38b46ee5a1043c7954766fd7dd07acb39634502e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CC 10592 bytes
font_02_sfnt_off00009cfb.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFB 4324 bytes

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