Malicious PDF — malware analysis report

Static analysis result for SHA-256 000ff3a9c5614c78…

MALICIOUS

PDF

44.0 KB Created: 2020-08-16 17:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 920b7481379e21bacc6d6fc913b641a0 SHA-1: 1af3aedabe72ee617f6de59fbcd57625d3ae3ea9 SHA-256: 000ff3a9c5614c78badc46c7884c96a62664c8129fe9e8867866f72f3d652fe1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, characteristic of a link farm designed to manipulate search engine results. One of the primary links, 'https://ttraff.cc/pify?keyword=concept+review+carbohydrates+and+lipids+answer+key', is flagged as a malicious redirector, indicating an attempt to lead users to harmful content. The document body, though partially corrupted, suggests a lure related to an answer key, further supporting the malicious intent.

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.cc/pify?keyword=concept+review+carbohydrates+and+lipids+answer+key
    • http://files.jacksongirlssoccer.com/uploads/1/3/1/3/131380612/jukasowopulib-derafunuxuvofud-bolopori-nigagutofifitoz.pdf
    • http://files.drfaridyounos.com/uploads/1/3/2/6/132681699/7ae3e97fe.pdf
    • http://didifimo.kfundtutoring.com/uploads/1/3/0/7/130775521/84e22.pdf
    • http://files.buckyd.com/uploads/1/3/1/4/131437689/1385741.pdf
    • http://xodumo.unitedmissionsofhope.org/uploads/1/3/2/6/132682879/gozofofigapapo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0242/0644/files/nedomitijilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1103/8632/files/kufator.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/17578718505.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/finudevotasez.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/98720019483.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/megoruvagevadevukarotoxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/wemofegexezixuretipikawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/95131234870.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/lumumojarerovuwuboriso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/windows_7_pro_product_key.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c23.bin
6124f78908fa67b317c4ecabd784eb2f5dc53e555fb801d52b369ce762694d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 5524 bytes
font_01_sfnt_off00007eec.bin
1c9e8ae405aff942b88b5c63de582edf92d3aae06aea08950c736196b23bb17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEC 10484 bytes

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