Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a389bffdce3d8b…

MALICIOUS

PDF

56.0 KB Created: 2020-08-26 06:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008240e2fe3b90179b30e0914e17fc49 SHA-1: ae6024aaa7423f3e14c2be8c6e63d3631f61631d SHA-256: 71a389bffdce3d8ba72d2a1b25ef5d0f59e4be62f56145d1cb852719f23654a8
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for 'Ansible playbook cheat sheet pdf' and embeds numerous links, including one to a known malicious redirector. The document body also contains the malicious URL, suggesting an attempt to trick users into downloading further content or visiting malicious sites. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=ansible+playbook+cheat+sheet+pdf
    • http://files.susanmccombs.com/uploads/1/3/0/7/130738848/0763c38dc.pdf
    • http://lomodi.marchdrumcorps.com/uploads/1/3/0/7/130776783/waxulutonefobedeza.pdf
    • http://siven.dontworryaboutme.com/uploads/1/3/1/3/131378950/magusesewemido-gaxisuravewur-mukonurar-zoxolikuweriwa.pdf
    • http://files.lauramgray.com/uploads/1/3/1/4/131437377/e29b74781f9051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8508/6374/files/jozozajesasisojasivegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/subaxakotifesafa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/wofemolugej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/92888362390.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/simifalitinepimatog.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/ios_13_beta_7_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/8825443156.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/ziwafivali.pdf
    • https://cdn.shopify.com/s/files/1/0429/6808/8742/files/mopuzowadakuraropagatav.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/taylorkayteee_workout_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/74433784461.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/62877106960.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/xotavejebemufizizor.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/descargar_biblia_de_estudio_holman.pdf
    • https://cdn.shopify.com/s/files/1/0462/6006/0314/files/49193868746.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_off000093ad.bin
0d3363c2483c4a94882fdc2c79a48ae2f2271b0a8b5ccc3e0a154f7d11c1ed88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AD 5440 bytes
font_01_sfnt_off0000a625.bin
1145b7ec34e9c11829bd401859d7b1ee592faae7872f3bf79b24851f1bc3ffb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA625 13936 bytes

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