Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8727a1152a8343e…

MALICIOUS

PDF

52.8 KB Created: 2020-08-11 06:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35203d2aa12e86d76af9111dacef3bb9 SHA-1: d7d4438edcf413a9a31d24de03e08ddbd1744d30 SHA-256: e8727a1152a8343e8e6dc4e04b688c18536cea8caead32ce7ffb7103e7f152b7
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=mapa+carril+bici+barcelona+pdf', which is a critical indicator of a redirection attempt. The presence of numerous other links hosted on Shopify suggests a link farm designed to obscure the final malicious destination.

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=mapa+carril+bici+barcelona+pdf
    • http://files.saturdayandsundayonsignal.com/uploads/1/3/0/7/130739906/4230024.pdf
    • http://figota.mtnviewladylax.com/uploads/1/3/2/6/132682076/2548041.pdf
    • http://rojiw.xebex.eu/uploads/1/3/2/6/132681579/jovulawa.pdf
    • http://files.wedorecyclinginsurance.com/uploads/1/3/0/9/130969874/3343997.pdf
    • http://bukone.childrensbridgefoundation.com/uploads/1/3/2/7/132710621/navixewopuf.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/rawez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/17304579307.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/renanaxesarukeke.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/55521342545.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/an_historical_survey_of_the_old_testament.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/magic_bullet_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/jusijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/tube_digestif_des_insectes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/39909389961.pdf
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/yuen_method.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/zifibidigadidiwamafos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/42158245671.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000749b.bin
0a05edffb7f5a96761ea0dad725d433088a13d817f691d56d95313849d09cf67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749B 5116 bytes
font_01_sfnt_off000085fc.bin
b5b4853a5588dee502100a6d940bf263e16b9de142638528712075ad1e132216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FC 1960 bytes
font_02_sfnt_off00008f1d.bin
7a02da73c5ff24218d04b188db7d31ceb9303d5dedd43b645f18a615a19d9b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1D 6068 bytes
font_03_sfnt_off00009ece.bin
89cbff26b2c4acf8c793b8229027ff8e0bd78d57dff23b515cb36d7b582a2eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECE 11280 bytes

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