Malicious PDF — malware analysis report

Static analysis result for SHA-256 48991c5daa78db98…

MALICIOUS

PDF

46.5 KB Created: 2020-08-06 07:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef00b26c75be1f89ff042d2bb4d95ad0 SHA-1: 18f76e6b2c920ec4f556aef67cf93c459a0c9502 SHA-256: 48991c5daa78db98ac0874efc3068a848f6d6fa7d0a6398166038de83b74dedd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains numerous links, including a critical redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body, though obfuscated, contains text related to Cisco BGP configurations and the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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=cisco+bgp+configuration+example+pdf
    • http://files.windstonehoa.org/uploads/1/3/1/3/131384113/jifikiz-zafaf.pdf
    • http://files.kathysloanwriter.com/uploads/1/3/1/8/131856158/9823132.pdf
    • http://files.fegerfurnishings.com/uploads/1/3/2/6/132681296/6723341.pdf
    • http://files.macmaniacs.org/uploads/1/3/0/7/130739510/jutekakepi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/zemakogibawegemoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/4354/4488/files/fur_elise_easy_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/sahih_al_bukhari_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/tisoberu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/25365848252.pdf
    • https://cdn.shopify.com/s/files/1/0433/0858/1019/files/lunexejupifedipifam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/28047229225.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/fupimewifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/vusiwabazofuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/99102567007.pdf
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/31769196367.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/pradhan_mantri_awas_yojana_list_2020_up.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_off00006ce8.bin
ddda2c49e186746c5c2be49c521991f1da1c841eac900b74271685ae1f483ce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE8 5588 bytes
font_01_sfnt_off00007fd5.bin
52d8a64ca7d9932bfc91ccb5e61f98c9b6a257131b41afb93f431288e14cb50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD5 13832 bytes

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