Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c05c7244b038f6…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 11:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f9385da803083f49d56cdc83654689b SHA-1: f10cb43e6852fbca7582f7f948aed091bce87bac SHA-256: 96c05c7244b038f684cadcb052f46bd29a4207734abf9d263cc4b9bb276636b8
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=midpoints+and+segment+congruence+worksheet+answers. The document body, though heavily obfuscated, contains references to a worksheet and answers, suggesting a lure to entice users to click the malicious link. The ML classifier strongly indicated maliciousness.

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=midpoints+and+segment+congruence+worksheet+answers
    • http://files.broadwaypinups.com/uploads/1/3/0/8/130813765/8391871.pdf
    • http://files.lightthewaytraining.com/uploads/1/3/1/3/131380841/botegifugevugigozeku.pdf
    • http://files.aggieowned.com/uploads/1/3/1/8/131856627/gakakodemekela_metajonag_fibexibojifope.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/82542746780.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/87843435999.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/72754801138.pdf
    • https://cdn.shopify.com/s/files/1/0428/5104/1447/files/82336886521.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/xupasojoxudup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/15302293560.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/bsc_3rd_year_chemistry_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/89752084872.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/agricultural_economics_phd_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/76051349504.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/44277152469.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/luzunotetutaserajosepo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8341/5204/files/40708474025.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_off00005f6f.bin
3c1dbc356053c460c99cdfdc920c95f346dd18ae3e871aca02c10387d22e756e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 5616 bytes
font_01_sfnt_off0000727c.bin
1806cb3b4bacc6bfbdee3ad0bff06203837e70e9082aac0596513d284495244e
pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 9896 bytes