Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fb087033aa3ae5…

MALICIOUS

PDF

53.4 KB Created: 2020-08-17 05:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd5c00a6367c4c910aba2a8ac2bfc869 SHA-1: e65a2c041d2fd39d44bc870f76a31fec84af3f1c SHA-256: 00fb087033aa3ae59724444adfe79f9e48a3771d1aec18c6dea74fa42b46d969
162 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, with one specifically pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=define+inventory+management+pdf`. The document body and heuristics suggest a lure related to 'inventory management pdf', likely intended to trick users into clicking the malicious link. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=define+inventory+management+pdf
    • http://files.christinaedmondson.com/uploads/1/3/1/3/131397971/xususipabanasab.pdf
    • http://dizuwu.fccbrownstown.com/uploads/1/3/2/8/132814930/xevede.pdf
    • http://jewapuj.myworldsparkles.com/uploads/1/3/1/6/131637419/a72b92f4a2.pdf
    • http://vopefevu.taufiorito.info/uploads/1/3/2/3/132303382/vixux.pdf
    • http://files.igcseaccounts.com/uploads/1/3/0/7/130775612/90790b207da7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/72879631850.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0435/5185/0647/files/bach_prelude_cello_suite_1_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/80974994558.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/zesazepurasurowolitit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/28481997738.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/wojonubejilamipoloj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4482/3452/files/guia_ceneval_contaduria.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/14746766645.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6822/files/biblia_de_jerusalen_completa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008510.bin
86f2a0a365ae7897b6243466cc4f4a506359fa2bc77d78abb65949deb0dba017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8510 5100 bytes
font_01_sfnt_off00009662.bin
38915a5cd4c17c5fed8758e41e8d4790c35ea6d469fcf33d54eed00207168aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 10444 bytes
font_02_sfnt_off0000ba12.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA12 4324 bytes

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