Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2ba9c442fd719a…

MALICIOUS

PDF

36.9 KB Created: 2020-09-14 10:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c82ad5d6371bacf1361d7bd381b669bd SHA-1: 5c9c370cd93d0b507fab15019b2647bda787db93 SHA-256: 7d2ba9c442fd719a9a44b8b9a085f57d93d5d28e60e4078b5639a7482cc384ec
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one redirecting to a known malicious infrastructure. The document body, though partially corrupted, includes text related to a 'technician guide service manual' and the malicious URL, suggesting a lure to trick users into clicking on potentially harmful links. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious redirector attack.

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.me/pify?keyword=apple+thunderbolt+display+27-inch+technician+guide+service+manual
    • http://files.husbandandwifeworldtravels.com/uploads/1/3/0/8/130815140/9091826.pdf
    • http://wazik.bendtrendhomes.com/uploads/1/3/1/6/131606490/lalorogedenibezod.pdf
    • http://files.southcreekcandleco.shop/uploads/1/3/1/8/131858481/7586349.pdf
    • http://files.inspiredlearningationa.org/uploads/1/3/0/9/130969663/bepiferagi.pdf
    • https://static.usrfiles.com/ugd/20d83a_4074409ce93b481bbd94e554cac207b1.pdf
    • https://static.usrfiles.com/ugd/c5d40f_af00100a94a84ff886db72a888b90846.pdf
    • https://static.usrfiles.com/ugd/7f16bd_9a562cf8d15648bba5c459a941eb642f.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_d265eef430344e86b734987061751bfb.pdf
    • https://static.usrfiles.com/ugd/2ddd39_a9a21b7a470441449301813a1c0309a6.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/fapezofaguzitibemub.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/gupomixosoduzeman.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/nakuwatunagoxopir.pdf
    • https://cdn.shopify.com/s/files/1/0438/3490/0642/files/one_republic_apologize_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/makekititatalage.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/chava_book_download_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/avast_4._8_license_key_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0134/files/android_messages_change_color.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_off00004f3b.bin
fa343fc51635ab99cdd026a8cd3bf2cfcf5ce1e0c4c0c14059ac9c3f9e703941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3B 6024 bytes
font_01_sfnt_off000063a0.bin
db4ed142ce17800242c91f965cb53d1e8519b2c29cf254d9ba4cb728a3f7b917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 10060 bytes

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