Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f52b71e0d691ad5…

MALICIOUS

PDF

38.4 KB Created: 2020-08-10 21:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1c1f13e6410803a9af05184518a03a2 SHA-1: a60244879fc5ac262312705d5707c839628064c9 SHA-256: 5f52b71e0d691ad58faf2a5a4cd63cf0fba74fdcd4713db7e1867210728e3a1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.cc/pify?keyword=alter+ego+b1+guide+p%25C3%25A9dagogique+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to create a link farm for SEO manipulation or to direct users to malicious content, likely for phishing or malware distribution.

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=alter+ego+b1+guide+p%25C3%25A9dagogique+pdf
    • http://files.letspaintarabic.com/uploads/1/3/2/8/132815123/lilezezedumisuvix.pdf
    • http://files.flashfoto.com.au/uploads/1/3/0/9/130969489/60f779.pdf
    • http://lazonefe.milagrodesignsantafe.com/uploads/1/3/1/6/131637419/5497978.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/44378982041.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/98508786421.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/riwiwefudoze.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/gimipumexaperak.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/dont_worry_be_happy_ukulele_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/livros_de_ortopedia_e_traumatologia_em.pdf
    • https://cdn.shopify.com/s/files/1/0435/4267/5608/files/mixasamikafejaparijid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/65360150881.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/5376273832.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/comcast_tv_guide_seattle.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/bibikoduwijaraven.pdf
    • https://cdn.shopify.com/s/files/1/0432/2672/6568/files/artemis_fowl_eternity_code_graphic_novel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/7194462196.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005619.bin
43a72d2647935a360e91e7b6bc6a3618ecf062c22e226d6dd93d82eaf9172ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5619 5480 bytes
font_01_sfnt_off00006883.bin
ec2f96dbf3ca3833e7d7b7917a7415c2fa838128fc103b2be5ba1d1386f0f214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6883 9956 bytes

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