Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae958846269b0eb9…

MALICIOUS

PDF

43.1 KB Created: 2020-08-23 01:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14dcc945cc38fbe83ce4d08562b0948a SHA-1: 0cc37545e27abc747f485ba8122093ec8c6db775 SHA-256: ae958846269b0eb9d304e029eb1ba0da7e16fd281e18631326fddb5f9fb6b094
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Black panther 4k wallpaper for mobile' and the malicious URL itself. This suggests a lure to trick users into clicking the link, which then redirects to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm 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.com/pify?keyword=black+panther+4k+wallpaper+for+mobile
    • http://files.landandairphotoworks.com/uploads/1/3/1/0/131070351/8867959.pdf
    • http://files.wittenbergchurchconsultants.com/uploads/1/3/2/7/132710575/luzalidulobovazo.pdf
    • http://files.gabesta007.com/uploads/1/3/2/7/132712093/6144052.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4455/files/70580010556.pdf
    • https://cdn.shopify.com/s/files/1/0454/8090/2806/files/bhagavad_gita_chapter_8_slokas_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/57613696800.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/rpg_maker_xp_para_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/automobile_engineering_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/benazoxoziwunazob.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/irs_form_4952.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/zumumafivomovor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/gisekavofozipuxujurojipum.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/the_casework_relationship_biestek.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/edward_jones_monthly_budget_worksheet.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_off00005515.bin
db52fe82f00e90fe05230baa36fa227a8838f9b74518c09e38693ae83d752974		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5515 5512 bytes
font_01_sfnt_off000067c0.bin
46d92b74705223034e04d7606e4efbc4ec2ec0ea4924f1b635ca872fa51df268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C0 9928 bytes
font_02_sfnt_off000089fa.bin
0646a63a478fe53468b8dbbe05b608d617a04836cde27f490c8d0ce00ae8a9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89FA 16164 bytes

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