Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82835a8fdc0e1f0…

MALICIOUS

PDF

118.7 KB Created: 2020-08-13 21:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9204e24af799734247df5313d325d47 SHA-1: b155460aa89d63b82fdd35453e03d8770ca5d089 SHA-256: f82835a8fdc0e1f0edeeb11cf9efcea9cc7588d030bc029ae6a122ba7100aa58
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Carrier chiller 30gx service manuals' and the malicious URL, suggesting a lure for users seeking technical documentation. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=carrier+chiller+30gx+service+manuals
    • http://files.paulinakalwarska.com/uploads/1/3/1/8/131856330/60419a8.pdf
    • http://lixufo.dehoniansocialjustice.org/uploads/1/3/1/1/131164250/sigijugekibipi.pdf
    • http://files.sngprinting.com/uploads/1/3/1/3/131379510/xaxifibiluru-bimejagikulutag-kufimisix-wesagaleta.pdf
    • http://jerevofi.dagazliving.com/uploads/1/3/1/4/131437987/a2ddd02f6bd327.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/82938611979.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0572/files/product_category_management_chiplunkar.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6861/files/administracion_de_recursos_humanos_gary_dessler_pearson.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/95311390863.pdf
    • https://cdn.shopify.com/s/files/1/0449/0412/0475/files/the_hobbit_strategy_battle_game_rulebook.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/bolikodirumuvivigola.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8988/files/lcm_of_5_and_6.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1421/files/gixuvefazab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/60492427953.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/belize_passport_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/increase_brain_power_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/pirilarulozepowajoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/62309787849.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_off00018055.bin
733a68d326f137a049f2f11379a653f4a81c694c2310ba568157f2e2a801473d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18055 5360 bytes
font_01_sfnt_off0001926a.bin
98fc046c663793edd4792a5dd5316bbf8ea22300b0e798a90ee5e6d7602d91d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1926A 13936 bytes
font_02_sfnt_off0001bf12.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF12 4324 bytes

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