Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff11d962f6e03f3…

MALICIOUS

PDF

47.2 KB Created: 2020-08-16 18:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b1f56c925bb0a61ac19e7367665911d SHA-1: 843797214624b94990ef2ba638a736461ba4a1dc SHA-256: 0ff11d962f6e03f390263b11901082cd84153e6984a837edccdce8e9ab6a92c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to clothing sizes, which is likely a pretext to drive users to malicious sites. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of 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.com/pify?keyword=guide+des+tailles+jean+levis+homme
    • http://puger.c10soulclothing.com/uploads/1/3/2/6/132680903/laviwegarivu-lukofibakexodi.pdf
    • http://files.thewinfrey4.com/uploads/1/3/0/8/130874250/7d267d6abe0.pdf
    • http://files.institutotathagata.org/uploads/1/3/1/8/131871921/galix.pdf
    • http://jerupo.dogsdowntownva.com/uploads/1/3/0/8/130814328/aad85974904.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/89442498066.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/sewimamemakutepona.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2864/files/chemistry_timberlake_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/35969551530.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/45171450056.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3447/files/16248083442.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/kobotosuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/timuxasedejuvomepoxegu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/chakli_recipe_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/11649442674.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/83131974029.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061dd.bin
3f744cd158337ee862d1be287a5d107302239afdf795f652b49a2395b4e07761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 5016 bytes
font_01_sfnt_off000072c7.bin
9dd9ff0809e968fb8b12157201bf81a250135cb8b85a55184f5d5e5af8bc7c69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C7 15852 bytes
font_02_sfnt_off0000a1c6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C6 4324 bytes

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