Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e99ceec0bd8803…

MALICIOUS

PDF

116.2 KB Created: 2020-09-09 17:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ecdd005ff24ed8f3d50a4292894023 SHA-1: 62b034a7b94cf145c30dd2514443da9e89f86e0e SHA-256: 95e99ceec0bd880359d548299411717b6190cac3a83865288dc5f67c2052b24a
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as an answer key, intended to lure the user to a malicious site. The PDF also hosts a link farm, suggesting an attempt to manipulate search engine results. The presence of a visual download button further supports a deceptive social engineering tactic.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/pify?keyword=11th+half+yearly+answer+key+2018+chemistry
    • http://files.theturfsmurf.co.uk/uploads/1/3/0/8/130874493/givawepuweruz_tupap_lofupul.pdf
    • http://files.straffordparkhoa.com/uploads/1/3/1/4/131437363/penoxoremasatu_xufaxomabejak_xidikijux_fosage.pdf
    • http://files.gfitlifestyle.com/uploads/1/3/1/3/131384468/378092.pdf
    • http://monupaxot.derekdbass.com/uploads/1/3/1/4/131438044/luwimexalawe-nekovubomol.pdf
    • http://files.georgetownquintet.com/uploads/1/3/1/4/131454523/luzibuwitanubub.pdf
    • https://cdn.shopify.com/s/files/1/0435/5126/0823/files/bc_landfill_gas_management_facilities_design_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/penabebifibiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/miniwokozekesesoxuzawok.pdf
    • https://cdn.shopify.com/s/files/1/0441/4350/9656/files/asterisk_war_manga.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/zilusalokamirazele.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/wofazinej.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012b66.bin
a4daab8ead0c4289fa10a2253a566ed1eb6b71301daff53a8c3b4a1d9ae5dfc1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B66 19852 bytes
font_00_sfnt_off000118e6.bin
c6ff54f2a8c543d017bee1cac38327e5b7850ac9b9061b6e48d3404ca5d1570c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 5480 bytes
font_02_sfnt_off000156af.bin
4a7a17ef0ba0b87d3101fb253220c21ebf70d31c9b38729fcc60725578a726a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156AF 1944 bytes
font_03_sfnt_off00015ff7.bin
17c73a16fdb10de6bda95d48c1e891cbd0645169e113fd5038553f85c14e2205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF7 15452 bytes
font_04_sfnt_off00018faa.bin
a226e132c99cb91c210d2dd1457d2aca660610af9a4b991948350cc7bb3c1781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18FAA 16364 bytes
font_05_sfnt_off0001a5b5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5B5 4324 bytes
font_06_sfnt_off0001b3b4.bin
fa88534278b7996036ad4339e2b546ede69c8c086b5381ad50ca868be81e9280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3B4 3616 bytes

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