Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb26396fa020789…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 12:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc4386b35fe833480d5919d67ee24e07 SHA-1: fbac804a2d4a16a91a886404ddfbd5741c1e14e2 SHA-256: cfb26396fa020789ee1187fe11242f6e73c2f12aadf305126115ce328b5d9e9a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector and a link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=academic+advisement+report+peoplesoft', is designed to redirect users to other potentially harmful sites. The document body, though heavily obfuscated, contains text related to academic advisement reports, suggesting a lure to entice users to click the malicious links.

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=academic+advisement+report+peoplesoft
    • http://monajolog.bbfsfiresafety.com/uploads/1/3/1/3/131383478/739468.pdf
    • http://files.hornedreaders.net/uploads/1/3/0/8/130873927/zisujupul.pdf
    • http://periw.davidsmatthews.com/uploads/1/3/1/4/131438428/42dd7fb5473c.pdf
    • http://files.oleanfoodpantry.org/uploads/1/3/0/7/130740189/lifitegakofafaf-jizijunuga.pdf
    • http://files.poulsborvspecials.com/uploads/1/3/0/7/130776041/lifovez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/bebovofikukuzugusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92588710477.pdf
    • https://cdn.shopify.com/s/files/1/0436/9642/3080/files/star_wars_battlefront_2_pc_mods.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/jr_monga_basic_corporate_accounting_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/fusionner_avec_adobe_acrobat_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/dalakaker.pdf
    • https://cdn.shopify.com/s/files/1/0448/2239/7088/files/47326901051.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/vegijupexipuzizibenizu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/cadsofttools_to_dwg.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/lunetosuwasagu.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_off00005f74.bin
265cc6e3dcb6436d527e2b32cd1044a016a3b2029fa98788aeaf976f03ddc195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 5352 bytes
font_01_sfnt_off0000718d.bin
005ddefb7be0903f5882f3cd29f61795d61a578c077e65a8355bb308767b959b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718D 9432 bytes

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