Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0005551305aa9b6…

MALICIOUS

PDF

41.8 KB Created: 2020-08-15 07:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3aa4c15c5bbe7b3497992eb4a5b76cb SHA-1: 88ce0b8c2158c19f535795c1399c4880d6b68a42 SHA-256: f0005551305aa9b623e8d995c1c711932aaac08909b0f028f8f3b8c16c48809c
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of embedded links, characteristic of a link farm designed to host malicious content or phish users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the embedded URLs.

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.com/pify?keyword=reporter+gottino+saiu+da+record
    • http://files.ponciauparkbowls.com/uploads/1/3/2/6/132682134/bojitulop_pobuwopeg_walewagutik_widuxatadazigid.pdf
    • http://files.kwitoskiandassociates.com/uploads/1/3/2/7/132710753/dotabemakeratiz.pdf
    • http://files.grayducks.org/uploads/1/3/2/6/132696274/fasamodanegefuk_jakutuvan_tijokowagetop_fumob.pdf
    • http://jokaguki.paraglidinginperu.com/uploads/1/3/0/7/130740044/vofin.pdf
    • http://files.atouch-ofhealing.com/uploads/1/3/1/4/131437474/dubuzigufovilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6724/files/zisijodalesunikideka.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/96406602884.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/automatismos_industriales_paraninfo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/95943205266.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/jajoniweridoralubukisij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39843759369.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/2004_gmc_sierra_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1676/5088/files/faraxid.pdf
    • https://cdn.shopify.com/s/files/1/0435/0191/2224/files/zepofuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/casate_conmigo_mary_balogh_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/43608949646.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/poropekuxukekisewamene.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_off000063fa.bin
029af6775cf1807941ba73ec8f750e268bf93a14f18c13d200698b831555b84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 5216 bytes
font_01_sfnt_off000075cc.bin
39508aa79113644d87fda5323876cf4e6772e3937406ba60346f10b4ccfb4571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 10644 bytes

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