Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0c937e496cc66d…

MALICIOUS

PDF

50.3 KB Created: 2020-08-14 15:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7bf2978f822d48ae2a98e1eb89d2aa6 SHA-1: 229f675219cea14de61e6f3012d4da014d9c0dd3 SHA-256: df0c937e496cc66dcc0c424f8befdfc60ccbc84edabc2ac79eead7ece25074d3
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and the primary URL suggest a lure related to 'Clash of Clans update 2018 apk', aiming to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=clash+of+clans+update+2018++apk
    • http://fufaxez.nikkiwray.com/uploads/1/3/1/4/131407668/9485031.pdf
    • http://files.northcountryblog.com/uploads/1/3/1/8/131858540/vepelavo.pdf
    • http://pemega.thenatureofthecosmos.com/uploads/1/3/1/4/131452922/pamadut.pdf
    • http://files.primepropertyfinder.com/uploads/1/3/2/6/132683264/demabijegekifapedo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2362/0503/files/1985_honda_nighthawk_650.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/voxulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/74461643535.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/84429729371.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/xuvuwununixerapidonedap.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/74163503738.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/72798517008.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/24570981365.pdf
    • https://cdn.shopify.com/s/files/1/0432/2082/8315/files/98188586413.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/xokatisogurubemedakoluwiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/98680808512.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/41399597426.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_off00005b17.bin
681ac2699631e00290e40e6ba1dcd3cdfe2c0f80c0cd4e6ec092496b0432c353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B17 5588 bytes
font_01_sfnt_off00006e17.bin
11e788adda2e73dd88834227dbc85568c9fda99a74b42cc23f4f0740223955da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 13256 bytes
font_02_sfnt_off0000966a.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966A 16204 bytes
font_03_sfnt_off0000ab98.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB98 4324 bytes

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