Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb1b4c06ec68524…

MALICIOUS

PDF

48.1 KB Created: 2020-08-24 01:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcadaa2980cd5ab64cdb1303e9f0bd41 SHA-1: 3c5ef9e9898ba0b3f5e202a6266c936451ef5680 SHA-256: 3bb1b4c06ec68524116ee2d76ef48517913b56f9584a2af78ae83948b9d6e055
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link disguised as an 'SBI ATM card block application form' which redirects to a malicious URL. This suggests a phishing or social engineering attack aimed at tricking users into visiting a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content.

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=sbi+atm+card+block+application+form
    • http://files.devicessig.org/uploads/1/3/0/8/130813524/zovar.pdf
    • http://xegenikam.cathycarterartist.com/uploads/1/3/0/7/130775565/e747448a7076.pdf
    • http://files.isocandles.com/uploads/1/3/1/0/131070452/zubesudolafiroj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/23483660332.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/fenobovoxurosutizebow.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5592/files/haloperidol_drug_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/xavanavudabum.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/74921302540.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/eso_aetherian_archive_normal_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/wisujubadifon.pdf
    • https://cdn.shopify.com/s/files/1/0439/9159/7214/files/nudef.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/dictionnaire_d_accord_guitare_jazz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/wegizobofatovar.pdf
    • https://cdn.shopify.com/s/files/1/0438/6432/6309/files/berijapifidegevuso.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/lomilutinoburekazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/agriculture_images_hd.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/biblia_estudio_scofield_reina_valera_1960.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074c9.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C9 2828 bytes
font_01_sfnt_off00007ec3.bin
efff2dab658a303bd8822c5972928576bb76e743d5cc7b811e59856cb33e8289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC3 5432 bytes
font_02_sfnt_off00009120.bin
046bfa71817ee60622e7188b55e8c6f92c96aae026715f9dc2f1889a8da01c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9120 9804 bytes

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