Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d970b1d2830402…

MALICIOUS

PDF

66.5 KB Created: 2020-08-12 02:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d102c93fa22b005976bf0624a56e4ffb SHA-1: 8e190179ad6ca28d3854e3b85f807d6888bbff69 SHA-256: 92d970b1d2830402e4a79038e60358667885d38bdfa1375fe137e12fa1925bdc
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Al quran juz 26 pdf', likely intended 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=al+quran+juz+26+pdf
    • http://leved.2400chestnut.com/uploads/1/3/0/8/130874276/659152.pdf
    • http://jadufuf.voetlichtpedicure.nl/uploads/1/3/2/3/132302780/cfc9e.pdf
    • http://kiwivo.sugarbakeshopperi.com/uploads/1/3/0/8/130874493/240af058470ce37.pdf
    • http://mapaz.mobile-massage-sydney.com/uploads/1/3/1/6/131606490/8564458.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/87248000596.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/8363849329.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/jogigoriw.pdf
    • https://cdn.shopify.com/s/files/1/0438/7035/5611/files/colloquial_english_gareth_king.pdf
    • https://cdn.shopify.com/s/files/1/0447/8589/3542/files/accounts_receivable_aging_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/35468640959.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/carcel_de_amor_diego_de_san_pedro.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/lil_man_pt_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/7459718980.pdf
    • https://cdn.shopify.com/s/files/1/0430/7766/4929/files/8470196397.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000bffb.bin
0925089dd4ec6651e20c7a11f0a36a4e7cfae8e490a92b3b5453211c2198fcbd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBFFB 25760 bytes
font_00_sfnt_off000075c8.bin
31766c1149bc0b12c2885d2be405c623137342e9d04c55832820decd8c612cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C8 4912 bytes
font_01_sfnt_off00008680.bin
a64b48f200c7731436782e21a9de3c324755560262d0cf3a867c633ed864867a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8680 4032 bytes
font_02_sfnt_off0000933d.bin
77747582e2ec69cf47edc858377c237f962da1b9662c40d28a7bd1a78232773c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933D 14840 bytes
font_04_sfnt_off0000ee55.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 4324 bytes

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