Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b62f01b6888ff9…

MALICIOUS

PDF

39.6 KB Created: 2020-08-10 05:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa6741d3c41b901ab20c99f21f9d2841 SHA-1: 2d74230a2ea4c4aab58ae1c01e5f3bbd12df0db4 SHA-256: 56b62f01b6888ff9da2e6e2c0badb29c43b3191627ad4ba73484a1383e62c8df
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=singular+and+plural+nouns+worksheets+grade+4+pdf'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of a large number of external PDF links further supports the malicious intent, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=singular+and+plural+nouns+worksheets+grade+4+pdf
    • http://files.gaulke4assembly.com/uploads/1/3/1/3/131383553/wulerefatowowa-xamexexeziz-dovikal-zimitaju.pdf
    • http://files.beyondessentialoil.com/uploads/1/3/0/7/130739232/rukozijoroni.pdf
    • http://files.tacosxavi.com/uploads/1/3/0/8/130874066/muzefapo_gejerew_bitikumef_podob.pdf
    • http://files.lowerbrimleycoombefarm.com/uploads/1/3/0/7/130739076/2654222.pdf
    • http://files.whogivesascrapcolorado.com/uploads/1/3/0/7/130776481/piwerelixuna.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/41211690693.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/banejugakasojimol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/zifumoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3706/5370/files/gazewididazaxujebojefuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4892/files/tevevoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/dimethyl_ether_msds.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/16633449245.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/zofur.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/65604856757.pdf
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/green_lantern_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/46984624243.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050c5.bin
9864c30b6475391b87d0d6b1f7ee7c5e1b62dedaae263a8154c0b1af64ca5249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50C5 5532 bytes
font_01_sfnt_off0000639b.bin
67e537aa473a3852ef5155a0cce8658bcd109a93208ae43c97f38b920d54e65d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 9152 bytes
font_02_sfnt_off000082e0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 4324 bytes

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