Malicious PDF — malware analysis report

Static analysis result for SHA-256 301f11ab07da049f…

MALICIOUS

PDF

821.1 KB Created: 2020-09-17 08:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb9302f24f1d2d229d20be70a972eaa SHA-1: 986ff0b79667d672d69685da4aa5c2f2ad4ea367 SHA-256: 301f11ab07da049fb033edeb88ce69b8db3079419cf3789562955ebb52fe24be
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is highly indicative of malicious intent. The ML classifier also flagged this PDF with a high score. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious nature of the file. No scripts were extracted, but the presence of the malicious URL is sufficient for a high confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8981

Heuristics 3

  • 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.
  • 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/wix?keyword=riff+tamson+biff+tannen
    • https://9334bc97-9bfd-4f25-bb76-763793c5a5c6.filesusr.com/ugd/cdfdba_6becf765f8f24a99819a6a49c9c80adb.pdf?index=true
    • https://49645de3-b165-4ef3-bbc1-66734f40b22c.filesusr.com/ugd/0d018b_7bcd46cca7b04110988fdfa9b912b70c.pdf?index=true
    • https://e6a6dbbe-9089-49e4-807a-6a0aa97c9de5.filesusr.com/ugd/31bf02_f9ebd56de4f84778bc5f69bc37dd4187.pdf?index=true
    • https://b97ceda6-fb30-4084-904a-30b2b893e7bd.filesusr.com/ugd/dcbeda_144f57e7406b416bbd91f11e570a97bd.pdf?index=true
    • https://067d1588-8aa8-498b-83dc-60d606d5a218.filesusr.com/ugd/ce14f3_809dcbeb94334af89bd2bdbf97afc6ef.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/5644/7136/files/calculus_textbook_pearson.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3704/files/wifotamobomexutisutularix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5664/files/tile_metal_roofing_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0486/4039/3384/files/rokera.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/lexosuvajuragepoxomopiwev.pdf
    • https://cdn.shopify.com/s/files/1/0431/7662/4279/files/epdm_rubber_sheet_3mm.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/40584475521.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2147/files/anabole_dit_ernhrungsplan.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2735/files/share_market_basics_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/oatey_purple_primer_sds.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/zosotasitizosinopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/dainik_bhaskar_epaper_raipur_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/firupiwamuxan.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/emergency_care_13th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0463/1271/8498/files/22066844220.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_off000c730b.bin
569713c019e302e4bc27ff521a5f15938cfbc94281e70ab930854580a9ce6ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC730B 4932 bytes
font_01_sfnt_off000c83d6.bin
024045d7f04b9e37225dfc70b363a0bc06c75a3221b08563d0bdbed198f8801b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC83D6 20784 bytes

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