Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e1b263bc0976c9…

MALICIOUS

PDF

72.6 KB Created: 2020-08-03 15:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b07b3232258e8ad69a04c43c2ec0277 SHA-1: aa3ab6032159cbbf77f48f6201210122bfe3dde6 SHA-256: 62e1b263bc0976c95e58eed0df662fb8d63b179de469ba39cffdd28747212609
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, which is likely intended to lead the user to a malicious site. The PDF also hosts a large number of external links, many of which point to other PDFs, suggesting a link farm designed to manipulate search engine results. The ML classifier strongly indicated maliciousness.

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.ru/pify?keyword=warsaw+pact+uniforms+pdf
    • http://files.theditr.com/uploads/1/3/1/1/131164472/nutixikuranivusi.pdf
    • http://files.structure-productions.com/uploads/1/3/2/3/132303219/sobutet-risozazoxine-dududipefemeko.pdf
    • http://files.lailaiorlando.com/uploads/1/3/0/7/130775537/51a1a19529d.pdf
    • http://files.drewryfarmsmaple.com/uploads/1/3/1/6/131607075/supijefegajofinatix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4584/5152/files/7771211421.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/72146174112.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/install_virtualenv_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3388/files/58029078866.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/84020852560.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/fusalexudutim.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/bodomobad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/pekebik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/laxigitifudavizemitipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/pifinagugopiroluman.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44484222312.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/49463730099.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_off0000cfd6.bin
3a401b915e0d8c1ecc1458349cda181e8a1d3d198e88d6f80da340fbaee2b799		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD6 5136 bytes
font_01_sfnt_off0000e140.bin
3833a6d38da2cbdd5ad9b5058aea14730fa1951c07d4958475590ed576d9ede4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 11020 bytes
font_02_sfnt_off000106f6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F6 4324 bytes

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