Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abe2922c1894932…

MALICIOUS

PDF

49.1 KB Created: 2020-08-03 22:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be2eae598153683b5531cfefc688c3fc SHA-1: ca30050c52a0b8dd6ee4b0305265897088aa7815 SHA-256: 4abe2922c1894932eb72e29911126ffd0511600dd549ae343434f16ff9f66360
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Ielts writing task 2 pdf free download 2020', suggesting a lure to entice users to click the malicious link. The PDF also contains a large number of external links, many pointing to Shopify domains, which is flagged by PDF_SEO_LINK_FARM. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ielts+writing+task+2+pdf+free+download+2020
    • http://files.airductcleaningftworth.com/uploads/1/3/0/7/130775363/6199148.pdf
    • http://files.timelessvaca.com/uploads/1/3/0/8/130813364/rufix.pdf
    • http://files.strictlyskillsbasketball.com/uploads/1/3/1/6/131636764/4217464.pdf
    • http://files.nannypalooza.com/uploads/1/3/1/4/131437535/bunelekogosiz_zoredegalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2280/files/24979075073.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/abilhand_kids_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/25610218349.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/76673156224.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/ziwegezividuva.pdf
    • https://cdn.shopify.com/s/files/1/0434/0541/0471/files/tanazinesafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3514/0007/files/gmat_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/65920670906.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/56263318137.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/xevos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/small_text_discord.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/wowowuxasawafixugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/2811207427.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f5.bin
2365189fb8a592740eabb452b963d9519dcbea6e81b2902675b7eb2310b5d153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F5 5364 bytes
font_01_sfnt_off00007c45.bin
aeee9b2fd577c594ede074a7e3493832e024aab8d381a7c1d16527c2e435dd06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C45 2252 bytes
font_02_sfnt_off00008683.bin
c30876b31824d725e2806489c88779e47de03e48fadd844c5a33ad5f488c87a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8683 10008 bytes
font_03_sfnt_off0000a8b8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B8 4324 bytes

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