Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadd349abd02ed47…

MALICIOUS

PDF

56.2 KB Created: 2020-08-14 10:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb36093e09ee8acbfc8292ce596d6f39 SHA-1: 067b5e2d2fcdfe6c80cf96099a428d519fb8c0c6 SHA-256: aadd349abd02ed470914a2e9d06a00a1a6719bf7bc7f127ffbce1570ca3e557d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure for users interested in free movie soundtracks. The ML classifier strongly supports the malicious nature of this PDF.

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=flight+movie+soundtrack+free
    • http://jogujita.belairecounseling.com/uploads/1/3/1/3/131383651/lavojisekujano-kavizaxiga-losumopifov-zuzov.pdf
    • http://vavam.csdigitalsolutionsgroup.com/uploads/1/3/1/4/131412032/pupopabak.pdf
    • http://files.mhi-hoa.com/uploads/1/3/0/7/130739165/zalobufamagovoresat.pdf
    • http://files.authormariebenedict.com/uploads/1/3/1/3/131379213/83022.pdf
    • http://files.calistosecretkennel.com/uploads/1/3/1/1/131163836/3774077.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/sudaxinutitovoxutugab.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/3458465855.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/dexufivitadutiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/xefuwodiwitiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/6274/6517/files/absolute_power_of_questioning_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/dun_and_bradstreet_report_explained.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/43901866098.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/bavorid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/guseruvadozowatepol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/gideragaviguvopole.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/worksheet_maker_name.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/raneziditesomalit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/80312137804.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ddb.bin
f8602516d8f631613fa20e8ef9436017a61decc6c29d5333055b4e22db5d0396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDB 5516 bytes
font_01_sfnt_off0000b084.bin
fff7c650683a9ddc172535615ba677b2ffa9b501359e7deaf4f0c00827a8fecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB084 10380 bytes

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