Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b3e0a4cb267f7f…

MALICIOUS

PDF

81.5 KB Created: 2020-09-19 21:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfda30c8ee2116ab1aac64810773eeed SHA-1: 1405686f0dbb69cd449eb2276c7aa599e1632bdb SHA-256: 09b3e0a4cb267f7f62faeaf7b979a17bd76e64474cefbf49ca0247d3f1e48de9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for anime-related content. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=kashimashi%20girl%20meets%20girl%20episode%201%20english%20dub
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/83405355622.pdf
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/list_of_all_synonyms_and_antonyms.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/begonavofasudijenizore.pdf
    • https://cdn.shopify.com/s/files/1/0433/4646/0830/files/fupopolojoleluxikodik.pdf
    • https://cdn.shopify.com/s/files/1/0433/3846/5435/files/tenshin_shoden_katori_shinto_ryu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/nobedukelaxexiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/corel_draw_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/hard_c_soft_c_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0458/2447/5299/files/89867098360.pdf
    • https://cdn.shopify.com/s/files/1/0436/7597/5830/files/car_payment_statement_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5591/4908/files/amadeus_project_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/21235656216.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5733/files/the_dallas_buyers_club_parents_guide.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000d399.bin
cb8729abc004a8a1deacd37bd481af218f8bf04583b8f2e70fef3ac92106e926		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD399 18572 bytes
font_00_sfnt_off00007af9.bin
a5b5c3f7f7ecf80ecdc322ad1f51b8298f89b06fa4a48fec4f6eddac12502318		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 22192 bytes
font_01_sfnt_off0000c166.bin
7eaa302f43ebaafbf8a18d5c3f353442cc7a97713ba9d944ee310b1a4508c30d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC166 5416 bytes
font_03_sfnt_off000104ca.bin
4dfecf14336dd1ab0f7865427605b3b4b54bd64f443c4a4a16f42f6773354234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 9840 bytes
font_04_sfnt_off00012661.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12661 4324 bytes

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