Malicious PDF — malware analysis report

Static analysis result for SHA-256 505c1078950d6df3…

MALICIOUS

PDF

70.3 KB Created: 2020-08-07 19:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 320a06717601f768b1dfbd01fd906e5f SHA-1: a07bd9c686f2d11feac26c4130b1092243d30c22 SHA-256: 505c1078950d6df3d10e34d9f4374cf11af23339a3e52357dd1f463ffd1580fa
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'tamil panchangam calendar 2020 pdf'. This suggests the document's primary purpose is to trick users into visiting a malicious URL via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.cc/pify?keyword=tamil+panchangam+calendar+2020+pdf
    • http://ratatokup.outbuildingsok.com/uploads/1/3/2/7/132740873/vewezekozemi_nuvironu_zaropaxowawepid_punabasipop.pdf
    • http://files.stalbansdavenport.net/uploads/1/3/0/8/130815058/a81527.pdf
    • http://files.robotics.marisths.org/uploads/1/3/1/4/131407102/fiwafof-temilupageruvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/gawagumerigizomem.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/bambini_spazi_relazioni.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/sudulemukizumagadazewuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/87719895749.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/nikon_n90s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/header_file_download_php.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/16854861538.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/gebefirin.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/76387723752.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/66446437282.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/nelolewerozopad.pdf
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/ayushman_bharat_banner_csc.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/types_of_leaf_margin.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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1b.bin
227a8b3a827fa68d873474a2fe40f4dc3488f7e7be05d2701ba45a7d73df9f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1B 5212 bytes
font_01_sfnt_off00007d8c.bin
502bd8b228ab9aad99345974b8c6a098e32f7efe78cda1370915fb5fb6b9179e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 3780 bytes
font_02_sfnt_off00008b5c.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5C 3720 bytes
font_03_sfnt_off000096bd.bin
119e6e822f0d590784965e29fb294db986faf3f8ae5a7b3d50319e30de38a0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96BD 3228 bytes
font_04_sfnt_off0000a404.bin
c94dcd541879001c64de1ff4ec48d44e0cfad6f467645b3c8c9e868a3e12c175		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA404 3240 bytes
font_05_sfnt_off0000b0f4.bin
d104b65c883f8e920388b6893a8d989dbd1c4e4d26d5e01740bd7b740ee2777e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F4 4668 bytes
font_06_sfnt_off0000bfbc.bin
9a256443f8bea0cbc57d572488bf6e98f631489451c2263cea6247e45fc82123		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBC 10808 bytes
font_07_sfnt_off0000e2dd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 4324 bytes
font_08_sfnt_off0000f0dc.bin
19927a4d2798fe71456149d211c24597ba899223101a696eb11cbdd1f7530f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 6860 bytes

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