Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ebabf0a27a869d…

MALICIOUS

PDF

50.3 KB Created: 2020-08-11 06:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e292d12a5431ed8080de1c267f16a6a SHA-1: f6a0490480454ba63ca114b865c1ed046ae95a51 SHA-256: 49ebabf0a27a869d8e1833191bcc93cc4cad816bac6a37df26bbaf6f72a3a4f3
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.ru/pify?keyword=anglo+american+cataloguing+rules+pdf+download', is designed to lure users to download a PDF, but instead redirects them to malicious infrastructure. The document body itself is heavily obfuscated and contains junk data, but the embedded URLs are the primary indicators of malicious intent.

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=anglo+american+cataloguing+rules+pdf+download
    • http://guzotofu.coasttocountrycustomfurniture.com.au/uploads/1/3/2/6/132681231/besajexiragobu-bamulaju-zunerovovuwab.pdf
    • http://niwop.carrbridgeselfcatering.com/uploads/1/3/1/4/131408100/fibopuxeliv-bazebise.pdf
    • http://vagokek.divinelightandguidance.com/uploads/1/3/0/7/130776791/38a1b7.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4744/files/random_devil_fruit_generator.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/cub_cadet_lt1042_parts.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/antinomia_significado.pdf
    • https://cdn.shopify.com/s/files/1/0436/4068/4697/files/84986481592.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8965/files/cub_cadet_lt_1045_manual.pdf
    • https://cdn.shopify.com/s/files/1/0446/6583/1577/files/mla_style_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/wipufuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/xekibezanivodaba.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/6935389263.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0608/files/havoc_demon_hunter_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/ibps_clerk_english_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/nererir.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_off000086a9.bin
bbab263b269b042af2503da3c7efdc5b191bfe09ded3cabdecaac542e32a4545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A9 5556 bytes
font_01_sfnt_off00009982.bin
8ce422db8fa6f39f1ab929f2fc0756bb00ddc735fc6d475ccf0130e7d05b2e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9982 10120 bytes

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