Malicious PDF — malware analysis report

Static analysis result for SHA-256 07de5888ee774959…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 13:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07cc04e72c4fa208d2358fb17a4343e3 SHA-1: 3e47ff2b7869f1b625fff1b57dc4fea32f36a15f SHA-256: 07de5888ee7749591eaea072356cae8e6b052e4791f7eafce8ffd08a4a73bb41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, classifying it as a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=complete+guitar+chords+guide+pdf', is identified as a malicious redirector, indicating an attempt to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=complete+guitar+chords+guide+pdf
    • http://teduj.kiwihobbies.com/uploads/1/3/2/7/132740285/3961430.pdf
    • http://files.cnuiv.com/uploads/1/3/1/3/131398222/0be1e0604bf7b42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/candidiasis_bucal_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/fractions_adding_and_subtracting_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/alimentacin_sana_y_saludable.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/xumugubez.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/68363001380.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/38061336223.pdf
    • https://cdn.shopify.com/s/files/1/0448/3615/9645/files/2018_bmw_i8_performance_specs.pdf
    • https://cdn.shopify.com/s/files/1/0434/2982/2631/files/visualize_this_nathan_yau.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/22567392088.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/sekaloxomoboralusevamiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/5494592561.pdf
    • https://cdn.shopify.com/s/files/1/0432/8213/7243/files/natural_bodybuilding_workout_routine.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_off00005ea3.bin
f85bc4e555fa130b80fbcd192337c27c1c693fd325274e56e5cc05319df2fb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA3 5476 bytes
font_01_sfnt_off0000710f.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710F 1800 bytes
font_02_sfnt_off0000799d.bin
bf9d0eab6d7f0d523f277a4108a6912c91850752e849402655ea774be6c6e1e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799D 10636 bytes

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